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 A028611 #6 Feb 20 2020 20:06:58 %S A028611 1,6,12,20,54,84,120,192,204,346,312,414,380,672,480,880,726,1152, %T A028611 1092,1440,1116,1920,1332,1860,2040,2106,1680,2640,2496,3360,3120, %U A028611 3108,3276,4580,2880,4992,4114,4500,3600,6720,5304,6720,4800,7392,5646,7844,6360,7500 %N A028611 Expansion of (theta_3(z)*theta_3(11z) + theta_2(z)*theta_2(11z))^3. %H A028611 Jinyuan Wang, <a href="/A028611/b028611.txt">Table of n, a(n) for n = 0..1000</a> %o A028611 (PARI) a(n) = polcoeff((1 + 2*x*Ser(qfrep([2, 1; 1, 6], n, 1)))^3, n); \\ _Jinyuan Wang_, Feb 20 2020 %Y A028611 Cf. A028609, A028610, A028612. %K A028611 nonn %O A028611 0,2 %A A028611 _N. J. A. Sloane_ %E A028611 More terms from _Jinyuan Wang_, Feb 20 2020