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 A107658 #13 Dec 11 2017 10:53:17
%S A107658 1,0,126,672,-36288,-413280,15087870,275661792,-6846707322,
%T A107658 -186737716704,3093536396160,126405712075104,-1274633447433024,
%U A107658 -84873293805379968,385697576191762044,56246329449791661600,31646424393253329408
%N A107658 Coefficients of 6th root of theta series of Coxeter-Todd lattice K_{12} (see A004010).
%H A107658 Vaclav Kotesovec, <a href="/A107658/b107658.txt">Table of n, a(n) for n = 0..693</a>
%H A107658 N. Heninger, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0509316">On the Integrality of n-th Roots of Generating Functions</a>, J. Combinatorial Theory, Series A, 113 (2006), 1732-1745.
%t A107658 terms = 17; QP = QPochhammer; s = ((QP[q]^18*(4 - 4*(1 + (9*q*QP[q^9]^3) / QP[q]^3)^3 + 3*(1 + (9*q*QP[q^9]^3)/QP[q]^3)^6))/(3*QP[q^3]^6))^(1/6) + O[q]^terms; CoefficientList[s, q] (* _Jean-François Alcover_, Jul 08 2017, after _Michael Somos_ *)
%Y A107658 Cf. A004010.
%K A107658 sign
%O A107658 0,3
%A A107658 _N. J. A. Sloane_ and _Michael Somos_, Jun 07 2005