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A009741
Expansion of tan(x)*sin(sinh(x)).
1
0, 2, 8, 48, 832, 34304, 1992704, 149382912, 14491045888, 1792468533248, 275860960329728, 51650706246205440, 11555611726669152256, 3044203421408056377344, 932732257836665756450816
OFFSET
0,2
FORMULA
a(n) ~ (2*n)! * 4^(n+1) * sin(sinh(Pi/2)) / Pi^(2*n+1). - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
Tan[ x ]*Sin[ Sinh[ x ] ] (* Even Part *)
nn = 20; Table[(CoefficientList[Series[Sin[Sinh[x]]*Tan[x], {x, 0, 2*nn}], x] * Range[0, 2*nn]!)[[n]], {n, 1, 2*nn+1, 2}] (* Vaclav Kotesovec, Jan 23 2015 *)
CROSSREFS
Sequence in context: A192411 A179563 A079802 * A322309 A009745 A009751
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and signs tested Mar 15 1997 by Olivier Gérard.
STATUS
approved