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 A374406 #23 Jul 08 2024 08:53:48
%S A374406 1,3,3,2,3,3,3,5,3,2,6,5,3,3,1,5,9,5,3,5,5,4,7,3,2,9,5,4,5,6,6,8,8,2,
%T A374406 6,4,5,11,8,3,6,5,4,9,4,7,11,8,2,5,8,7,13,5,6,10,7,6,4,7,8,9,4,2,11,
%U A374406 12,5,12,6,3,15,10,6,9,7,4,12,6,5,8,9,10,14,7,4,15,4,9,7,4,5,12,15,7,10,10,7,13,10,3
%N A374406 Number of ways to write n as an ordered sum of a triangular number, a square and a hexagonal number.
%H A374406 Seiichi Manyama, <a href="/A374406/b374406.txt">Table of n, a(n) for n = 0..10000</a>
%F A374406 G.f.: (Sum_{k>=0} x^(k*(k+1)/2)) * (Sum_{k>=0} x^(k^2)) * (Sum_{k>=0} x^(k*(2*k-1))).
%Y A374406 Cf. A000217, A000290, A000384, A160324, A240088.
%K A374406 nonn
%O A374406 0,2
%A A374406 _Seiichi Manyama_, Jul 08 2024