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 A343777 #15 Feb 16 2025 08:34:02 %S A343777 2180,554503705 %N A343777 a(n) is the least integer that can be expressed as the sum of one or more consecutive nonzero n-gonal numbers in exactly n ways. %H A343777 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PolygonalNumber.html">Polygonal Number</a> %H A343777 <a href="/index/Pol#polygonal_numbers">Index to sequences related to polygonal numbers</a> %Y A343777 Cf. A298467, A334007, A334008, A334010, A334011, A334012, A338105. %K A343777 nonn,bref,hard,more %O A343777 3,1 %A A343777 _Ilya Gutkovskiy_, Apr 30 2021