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 A028596 #6 Feb 21 2020 21:01:35 %S A028596 1,8,40,128,328,656,1216,1864,2856,3560,5392,6368,9856,10640,17000, %T A028596 16832,22600,23760,32776,32576,43792,52864,57568,58560,78528,76024, %U A028596 94864,98432,137864,116720,152512,143040,179240,179072,212112,237328,265768,242352,296704,295232 %N A028596 Expansion of (theta_3(z)*theta_3(7z) + theta_2(z)*theta_2(7z))^4. %H A028596 Jinyuan Wang, <a href="/A028596/b028596.txt">Table of n, a(n) for n = 0..1000</a> %o A028596 (PARI) a(n) = polcoeff((1 + 2*x*Ser(qfrep([2, 1; 1, 4], n, 1)))^4, n); \\ _Jinyuan Wang_, Feb 21 2020 %Y A028596 Cf. A002652, A002653, A028594. %K A028596 nonn %O A028596 0,2 %A A028596 _N. J. A. Sloane_ %E A028596 More terms from _Jinyuan Wang_, Feb 21 2020