login
A012518
E.g.f.: sech(sinh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-450/6!*x^6+2940/7!*x^7...
0
1, 0, 0, 0, -12, 60, -450, 2940, -14000, 34272, 929880, -22680240, 373861224, -5345779296, 65277500288, -619227292320, 1524395375360, 135262063693184, -5049805793018304, 129393583799366016
OFFSET
0,5
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Sech[Sinh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 20 2015 *)
CROSSREFS
Sequence in context: A219738 A309308 A127869 * A012315 A009062 A012308
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Mar 20 2015
STATUS
approved