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Column 2 of triangle A136502.
1

%I #2 Mar 30 2012 18:37:08

%S 1,-4,26,-308,6959,-306888,26732904,-4628215312,1597488685120,

%T -1101039613155676,1516536435306750724,-4175994577753360618608,

%U 22993788379965461938093352,-253190775338116964702467771168

%N Column 2 of triangle A136502.

%F G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1+x)^(2^(n+2)).

%o (PARI) {a(n)=local(M=matrix(n+3,n+3,r,c,binomial(2^(c-1),r-c)));(M^-1)[n+3,3]}

%Y Cf. A107354 (column 0 of A136502).

%K sign

%O 0,2

%A _Paul D. Hanna_, Jan 01 2008