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 A015152 #10 Oct 23 2012 17:42:37
%S A015152 1,2,1,8,7,134,37,8516,12259,2196098,-1896671,2242814912,8371908703,
%T A015152 9201070882046,-50188906239587,150640766448080444,1945921801461187291,
%U A015152 9876134472777874272122,-235305539337366453248999
%N A015152 Sum of (Gaussian) q-binomial coefficients for q=-2.
%H A015152 Vincenzo Librandi, <a href="/A015152/b015152.txt">Table of n, a(n) for n = 0..100</a>
%t A015152 Total/@Table[QBinomial[n, m, -2], {n, 0, 30}, {m, 0, n}] (* _Vincenzo Librandi_, Oct 23 2012 *)
%K A015152 sign
%O A015152 0,2
%A A015152 _Olivier Gérard_