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 A022042 #12 Oct 16 2018 07:27:19 %S A022042 1,220,5302,33528,116380,339064,719400,1538416,2624182,4763220, %T A022042 7217144,11676280,16317048,25022184,32503680,47430768,59759260, %U A022042 82927856,101189550,137904360,161928184,215389680,250679288,323294576,369052200,474160324,527004280,668075232,742047856 %N A022042 Theta series of D_11 lattice. %D A022042 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 118. %H A022042 Seiichi Manyama, <a href="/A022042/b022042.txt">Table of n, a(n) for n = 0..10000</a> %t A022042 terms = 22; s = 1/2 (EllipticTheta[3, 0, q]^11 + EllipticTheta[4, 0, q]^11) + O[q]^(2 terms); CoefficientList[s, q^2] (* _Jean-François Alcover_, Jul 07 2017, after LatticeData(D11) *) %K A022042 nonn %O A022042 0,2 %A A022042 _N. J. A. Sloane_ %E A022042 More terms from _Seiichi Manyama_, Oct 16 2018