OFFSET
0,3
COMMENTS
Sum_{k>=0} a(k)/(2^k*k!) = e^Pi - Pi (A018938).
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Exp[6ArcSin[x]]-6ArcSin[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 11 2012 *)
PROG
(PARI) a(n)=polcoeff(exp(6*asin(x))-6*asin(x), n)*n!
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaume Oliver Lafont, Apr 24 2010
STATUS
approved