This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A350209 #8 Feb 16 2025 08:34:02 %S A350209 65,151,330,316,515,645,888,824,1017,1348,1474,1614,1655,2006,2233, %T A350209 2255,2779,2805,2882,2865,3364,3653,3930,4035,4325,4765,4675,5016, %U A350209 4904,5446,5913,5990,6061,6954,6850,7681,8313,7846,7591,9035,8736 %N A350209 a(n) is the smallest positive integer which can be represented as the sum of distinct centered n-gonal numbers in exactly n ways, or 0 if no such integer exists. %H A350209 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CenteredPolygonalNumber.html">Centered Polygonal Number</a> %Y A350209 Cf. A101321, A350195, A350203, A350204, A350207, A350210. %K A350209 nonn %O A350209 3,1 %A A350209 _Ilya Gutkovskiy_, Dec 19 2021