login
A009352
E.g.f: log(1+sinh(x))*cosh(x).
1
0, 1, -1, 6, -16, 80, -421, 2800, -21736, 194304, -1961521, 22060544, -273408136, 3701321728, -54335326501, 859630860288, -14579917279216, 263892101169152, -5076781293615361, 103444435675512832, -2225448965436594976
OFFSET
0,4
LINKS
FORMULA
a(n) ~ (n-1)! * (-1)^(n+1) * sqrt(2) / (log(1+sqrt(2)))^n. - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Log[1+Sinh[x]]Cosh[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 04 2013 *)
CROSSREFS
Sequence in context: A211954 A230942 A188570 * A056204 A091148 A210370
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified and Mathematica program replaced by Harvey P. Dale, Jun 04 2013
STATUS
approved