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 A249622 #21 Nov 04 2014 13:41:15
%S A249622 1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,3,2,1,1,3,1,2,1,1,2,1,3,1,
%T A249622 2,1,2,1,1,2,1,1,2,2,1,1,2,2,1,1,4,1,3,1,1,1,1,1,1,2,2,2,2,2,1,1,1,1,
%U A249622 1,1,1,2,4,1,1,1,3,1,1,2,1,2,2,1,1,2,1,1,3,1,2,1,2,1,1,6,2,1,1,1,1
%N A249622 a(n) = number of ways to express A117048(n) as the sum of two positive triangular numbers.
%H A249622 Zak Seidov, <a href="/A249622/b249622.txt">Table of n, a(n) for n = 1..10000</a>
%e A249622 a(6) = 2 because A117048(6) = 31 and 31 = 3 + 28 = 10 + 21 (first case of two-way expression).
%e A249622 a(22) = 3 because A117048(22) = 181 and 181 = A000217(i) + A000217(k), for {i,k} = {{4, 18}, {7, 17}, {9, 16}} (first case of three-way expression): 181 = 10 + 171 = 28 + 153 = 45 + 136.
%Y A249622 Cf. A000040, A000217, A002383.
%K A249622 nonn
%O A249622 1,6
%A A249622 _Zak Seidov_, Nov 03 2014