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 A374808 #9 Feb 16 2025 08:34:07 %S A374808 15,95,305,1795,2366,12740,105080,193060,231560,446995,2422980, %T A374808 4753420,5490660,8205340,30594200,137606920,138532800,350464520 %N A374808 a(n) is the smallest number which can be represented as the sum of 3 distinct nonzero tetrahedral numbers in exactly n ways, or -1 if no such number exists. %H A374808 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TetrahedralNumber.html">Tetrahedral Number</a> %e A374808 a(3) = 305 = 1 + 84 + 220 = 20 + 120 + 165 = 56 + 84 + 165. %Y A374808 Cf. A000292, A334013, A374806, A374809. %K A374808 nonn,more %O A374808 1,1 %A A374808 _Ilya Gutkovskiy_, Jul 20 2024 %E A374808 a(12)-a(18) from _Michael S. Branicky_, Jul 21 2024