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 A319308 #10 Sep 17 2018 09:28:42 %S A319308 1,-40,760,-9120,77560,-497648,2508000,-10232640,34729720,-100906760, %T A319308 259114704,-606957280,1327461600,-2738111280,5341699520,-9915552192, %U A319308 17701924600,-30615844560,51294999960,-83279292960,131880275664,-204949382400,312126610080,-464844224960,680432137440 %N A319308 Expansion of theta_4(q)^20 in powers of q = exp(Pi i t). %H A319308 Seiichi Manyama, <a href="/A319308/b319308.txt">Table of n, a(n) for n = 0..10000</a> %F A319308 Expansion of eta(q)^40 / eta(q^2)^20 in powers of q. %Y A319308 theta_4(q)^b: A002448 (b=1), A104794 (b=2), A213384 (b=3), A096727 (b=4), A035016 (b=8), A286346 (b=12), A319307 (b=16), this sequence (b=20), A319309 (b=24), A319310 (b=28). %K A319308 sign %O A319308 0,2 %A A319308 _Seiichi Manyama_, Sep 16 2018