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 A283244 #13 Mar 04 2017 13:48:57
%S A283244 1,28,518,7439,90517,972398,9472190,85145743,715281840,5668682493,
%T A283244 42691867112,307312234334,2124355701646,14157081285263,91250293831492,
%U A283244 570441761053192,3466874635995098,20526329624103412,118608374492197651,669949478060261642
%N A283244 Expansion of exp( Sum_{n>=1} sigma_3(3*n)*x^n/n ) in powers of x.
%H A283244 Seiichi Manyama, <a href="/A283244/b283244.txt">Table of n, a(n) for n = 0..1000</a>
%F A283244 a(n) = (1/n)*Sum_{k=1..n} sigma_3(3*k)*a(n-k). - _Seiichi Manyama_, Mar 04 2017
%Y A283244 Cf. exp( Sum_{n>=1} sigma_k(3*n)*x^n/n ): A182819 (k=1), A283238 (k=2), this sequence (k=3).
%Y A283244 Cf. exp( Sum_{n>=1} sigma_3(m*n)*x^n/n ): A023871 (m=1), A282327 (m=2), this sequence (m=3).
%K A283244 nonn
%O A283244 0,2
%A A283244 _Seiichi Manyama_, Mar 03 2017