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 A283163 #19 Mar 04 2017 13:48:43
%S A283163 1,-7,17,-14,2,-21,36,13,-26,-24,10,12,-17,34,22,19,-96,-10,14,38,0,
%T A283163 12,-23,72,-38,-2,-11,-64,-34,0,72,84,-26,0,0,-79,60,24,-32,-58,-7,
%U A283163 -84,50,26,120,0,0,46,-34,-64,10,-119,70,0,22,-70,36,37,-120,0
%N A283163 Expansion of exp( Sum_{n>=1} -sigma(4*n)*x^n/n ) in powers of x.
%H A283163 Seiichi Manyama, <a href="/A283163/b283163.txt">Table of n, a(n) for n = 0..1000</a>
%F A283163 G.f.: Product_{n>=1} (1 - x^n)^7/(1 - x^(2*n))^3.
%F A283163 a(n) = -(1/n)*Sum_{k=1..n} sigma(4*k)*a(n-k). - _Seiichi Manyama_, Mar 04 2017
%Y A283163 Cf. A182820 (exp( Sum_{n>=1} sigma(4*n)*x^n/n )), A193553 (sigma(4*n)).
%Y A283163 Cf. exp( Sum_{n>=1} -sigma(k*n)*x^n/n ): A115110 (k=2), A185654 (k=3), this sequence (k=4), A282937 (k=5), A283164 (k=6), A282942 (k=7), A283168 (k=8), A283169 (k=9).
%K A283163 sign
%O A283163 0,2
%A A283163 _Seiichi Manyama_, Mar 02 2017