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Sum of (Gaussian) q-binomial coefficients for q=-2.
2

%I #10 Oct 23 2012 17:42:37

%S 1,2,1,8,7,134,37,8516,12259,2196098,-1896671,2242814912,8371908703,

%T 9201070882046,-50188906239587,150640766448080444,1945921801461187291,

%U 9876134472777874272122,-235305539337366453248999

%N Sum of (Gaussian) q-binomial coefficients for q=-2.

%H Vincenzo Librandi, <a href="/A015152/b015152.txt">Table of n, a(n) for n = 0..100</a>

%t Total/@Table[QBinomial[n, m, -2], {n, 0, 30}, {m, 0, n}] (* _Vincenzo Librandi_, Oct 23 2012 *)

%K sign

%O 0,2

%A _Olivier GĂ©rard_