A141134 Hankel transform of C(2n+4,n+4).

1, -8, 8, 1, 1, -16, 16, 1, 1, -24, 24, 1, 1, -32, 32, 1, 1, -40, 40, 1, 1, -48, 48, 1, 1, -56, 56, 1, 1, -64, 64, 1, 1, -72, 72, 1, 1, -80, 80, 1, 1, -88, 88, 1, 1, -96, 96, 1, 1, -104, 104

Offset

0,2

Comments

Hankel transform of A002694(n+2).

Hankel transform of A002694(n+1) is sin(Pi*n/2)*(cos(Pi*n)/2-1/2).

Links

Table of n, a(n) for n=0..50.

Index entries for linear recurrences with constant coefficients, signature (-2,-3,-4,-3,-2,-1).

Formula

G.f.: ( 1-6*x-5*x^2-3*x^3-2*x^4-x^5 ) / ( (1+x)^2*(x^2+1)^2 ).

Crossrefs

Cf. A002694.

Sequence in context: A200304 A110940 A172352 * A176155 A174127 A230153

Adjacent sequences: A141131 A141132 A141133 * A141135 A141136 A141137

Keyword

easy,sign

Author

Paul Barry, Jun 06 2008

Status

approved