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 A256052 #16 Feb 20 2019 09:46:11
%S A256052 8,24,56,112,216,392,672,1128,1840,2912,4536,6936,10416,15456,22632,
%T A256052 32728,46872,66472,93400,130200,180104,247312,337392,457408,616392,
%U A256052 826104,1101352,1460928,1928880,2535280,3318000,4324824,5615224,7263424,9362088,12025904,15396856,19650792
%N A256052 Coefficients of mock modular form H_2^(4) (divided by 2).
%H A256052 G. C. Greubel, <a href="/A256052/b256052.txt">Table of n, a(n) for n = 0..2500</a>
%H A256052 Miranda C. N. Cheng, John F. R. Duncan, Jeffrey A. Harvey, <a href="https://arxiv.org/abs/1204.2779">Umbral Moonshine</a>, arXiv:1204.2779 [math.RT], 2012-2013.
%t A256052 nmax = 50; a:= 8*CoefficientList[Series[q*Sum[q^(k - 1)*(Product[1 + q^j, {j, 1, 2 k - 2}])/(Product[1 - q^(2 j - 1), {j, 1, k}])^2, {k, 0, nmax}], {q, 0, 150}], q]; Table[a[[n]], {n, 1, 100}] (* _G. C. Greubel_, Jul 27 2018 *)
%Y A256052 Equals 8 times A256209.
%K A256052 nonn
%O A256052 0,1
%A A256052 _N. J. A. Sloane_, Mar 24 2015