One day, one decomposition
A072502: Numbers that are run sums (trapezoidal, the difference between two triangular numbers) in exactly 3 ways

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A072502.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A072502.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #run #sums #trapezoidal #triangular #graph #threejs #webGL

Okay, so I now have #varifocals (since earlier today). I was not #prepared for this! Rectangular shapes, like my phone, now appear #trapezoidal. 😵‍💫

I mean, I know why it kind of has to be that way, but il looks really weird. 🧐

I'll get used to it. I hope. 😅