A145063 Hankel transform of A145062.

1, -1, -3, 1, 6, -1, -10, 1, 15, -1, -21, 1, 28, -1, -36, 1, 45, -1, -55, 1, 66, -1, -78, 1, 91, -1, -105, 1, 120, -1, -136, 1, 153, -1, -171, 1, 190, -1, -210, 1, 231, -1, -253, 1, 276, -1, -300, 1, 325, -1, -351, 1, 378, -1, -406, 1, 435

Offset

0,3

Links

Table of n, a(n) for n=0..56.

Index entries for linear recurrences with constant coefficients, signature (0,-3,0,-3,0,-1)

Formula

G.f.: (1-x-2x^3-x^5)/(1+x^2)^3; a(n)=C(n/2+2,2)(-1)^(n/2)(1+(-1)^n)/2-(-1)^((n-1)/2)(1-(-1)^n)/2;

Crossrefs

Sequence in context: A317496 A304236 A360654 * A202851 A007650 A236540

Adjacent sequences: A145060 A145061 A145062 * A145064 A145065 A145066

Keyword

easy,sign

Author

Paul Barry, Sep 30 2008

Status

approved