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 A374806 #6 Feb 16 2025 08:34:07 %S A374806 10,19,37,52,82,109,136,241,226,217,247,364,427,457,541,532,577,637, %T A374806 961,721,787,1066,1102,1381,1267,1564,1192,1396,1816,1501,1612,1927, %U A374806 1942,2242,1792,2842,2587,2557,2422,2866,2887,3181,3271,3412,4126 %N A374806 a(n) is the smallest number which can be represented as the sum of 3 distinct nonzero triangular numbers in exactly n ways, or -1 if no such number exists. %H A374806 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TriangularNumber.html">Triangular Number</a> %e A374806 a(3) = 37 = 1 + 15 + 21 = 3 + 6 + 28 = 6 + 10 + 21. %Y A374806 Cf. A000217, A025415, A342326, A374807. %K A374806 nonn %O A374806 1,1 %A A374806 _Ilya Gutkovskiy_, Jul 20 2024