A136503 Column 2 of triangle A136502.

1, -4, 26, -308, 6959, -306888, 26732904, -4628215312, 1597488685120, -1101039613155676, 1516536435306750724, -4175994577753360618608, 22993788379965461938093352, -253190775338116964702467771168

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Formula

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

Prog

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

Crossrefs

Cf. A107354 (column 0 of A136502).

Sequence in context: A102202 A271613 A271614 * A114125 A063182 A293954

Adjacent sequences: A136500 A136501 A136502 * A136504 A136505 A136506

Keyword

sign

Author

Paul D. Hanna, Jan 01 2008

Status

approved