A144636 Column 1 of triangle in A144633.

0, 1, -1, 2, -5, 10, 35, -910, 11935, -134750, 1376375, -11761750, 48923875, 1209057850, -48943019125, 1218200233250, -25136059573625, 441933961719250, -5922915844470625, 18956805373756250, 2611377778731596875

Offset

0,4

Links

Table of n, a(n) for n=0..20.

Formula

E.g.f.: A(x)=B(x)-1/B(x)-1 where B(x)=(2+3*x+(5+12*x+9*x^2)^(1/2))^(1/3). [From Vladeta Jovovic, Jan 24 2009]

Crossrefs

Sequence in context: A138190 A056300 A326006 * A320430 A018418 A363429

Adjacent sequences: A144633 A144634 A144635 * A144637 A144638 A144639

Keyword

sign

Author

N. J. A. Sloane, Jan 23 2009

Extensions

More terms from Vladeta Jovovic, Jan 24 2009

Status

approved