OFFSET
1,1
COMMENTS
The EXP-transform of a(n) is equal to A121629(n).
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..400
FORMULA
E.g.f.: (1-2*x)^(-1/2) - 1 - log(1-2*x).
MATHEMATICA
Table[2^n*(Gamma[n + 1/2]/Gamma[1/2] + (n - 1)!), {n, 0, 50}] (* G. C. Greubel, Oct 04 2017 *)
PROG
(PARI) a(n) = round(2^n*(gamma(n+1/2)/gamma(1/2) + (n-1)!)); \\ Michel Marcus, Oct 05 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Karol A. Penson, Sep 26 2006
STATUS
approved