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 A281461 #6 Jan 24 2017 10:06:36
%S A281461 1,0,0,1,1,0,0,1,0,0,1,1,0,1,2,1,0,2,2,0,1,3,1,0,3,3,0,2,5,2,1,5,5,1,
%T A281461 3,7,3,1,7,7,1,5,11,5,2,11,11,2,7,15,7,3,15,15,4,11,22,11,6,22,22,6,
%U A281461 15,30,15,8,30,30,9,22,42,22,13,42,42,14,30,56
%N A281461 Expansion of Product_{k>=1} (1 + x^(7*k-3))*(1 + x^(7*k-4)).
%C A281461 Convolution of A281456 and A281457.
%H A281461 Vaclav Kotesovec, <a href="/A281461/b281461.txt">Table of n, a(n) for n = 0..10000</a>
%F A281461 a(n) ~ exp(sqrt(2*n/21)*Pi) / (2^(5/4)*21^(1/4)*n^(3/4)) * (1 - (3*sqrt(21/2)/(8*Pi) + 23*Pi/(84*sqrt(42))) / sqrt(n)). - _Vaclav Kotesovec_, Jan 22 2017, extended Jan 24 2017
%t A281461 nmax = 100; CoefficientList[Series[Product[(1 + x^(7*k-3))*(1 + x^(7*k-4)), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A281461 Cf. A035435, A281456, A281457.
%K A281461 nonn
%O A281461 0,15
%A A281461 _Vaclav Kotesovec_, Jan 22 2017