OFFSET
0,3
LINKS
N. J. A. Sloane, Transforms
FORMULA
From Vaclav Kotesovec, Oct 30 2017: (Start)
Recurrence: 2*n*a(n) = -(n+6)*a(n-1) + (13*n - 33)*a(n-2) + 3*(7*n - 18)*a(n-3) + 9*(n-3)*a(n-4).
a(n) ~ 3^(n - 1/2) / (8 * sqrt(Pi) * n^(3/2)). (End)
MATHEMATICA
Table[Sum[(-1)^(n-k) * Binomial[n, k]*(2^k * (2*k-1)!! * Hypergeometric2F1Regularized[2, 2*k+1, k+2, -1] - 3*(-1)^k/2^(k+1)), {k, 1, n}], {n, 0, 30}] (* Vaclav Kotesovec, Oct 30 2017 *)
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, May 08 2008
STATUS
approved