A038873: Primes p such that 2 is a square mod p; or, primes congruent to {1, 2, 7} mod 8

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A038873.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A038873.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A038873.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

My data have not been verified but my work is highly reproducible.
- Downloads (csv, img, dump) ➡️ https://decompwlj.com/
- Algorithms ➡️ https://oeis.org/wiki/Decomposition_into_weight_*_level_%2B_jump#Algorithms

#decompwlj #math #mathematics #maths #sequence #OEIS #Downloads #Algorithms #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research #PARIGP

A038812: Number of primes less than 1000n

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A038812.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A038812.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A038812.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A038772: Numbers not divisible by any of their digits

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A038772.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A038772.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A038772.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

My first, favorite and most important sequence, the weights of prime numbers: A117078
We see prime numbers classified by level and by weight on the graph.

A117078: a(n) is the smallest k such that prime(n+1) = prime(n) + (prime(n) mod k), or 0 if no such k exists ➡️ https://oeis.org/A117078

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A038770: Numbers divisible by at least one of their digits

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A038770.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A038770.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A038770.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

Can someone please tell the #toilet paper #manufacturers to #number the individual sheets on their #rolls? I always lose count!

#THANKS!

#fun #toiletpaper

A038618: Primes not containing the digit '0'

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Zeroless_primes.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/Zeroless_primes.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/Zeroless_primes.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

Decomposition into weight × level + jump of prime numbers in 3D, threejs - webGL (log(weight), log(level), log(jump))
➡️ https://decompwlj.com/3Dgraph/Prime_numbers.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A038599: Numbers k such that k^3 - 2 is prime

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A038599.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A038599.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A038599.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research