OFFSET
0,3
COMMENTS
Binomial transform of A037256.
FORMULA
a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2*k+1) * (n-2*k)!. - Ilya Gutkovskiy, Apr 10 2022
MATHEMATICA
nmax=21; CoefficientList[Series[Sinh[x]/(1-x)^2, {x, 0, nmax}], x]Range[0, nmax]! (* Stefano Spezia, Jan 15 2024 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Sep 19 2003
STATUS
approved