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A012762
Expansion of e.g.f.: sec(cosh(x)*log(x+1))=1+1/2!*x^2-3/3!*x^3+28/4!*x^4-160/5!*x^5...
0
1, 0, 1, -3, 28, -160, 1510, -13860, 162188, -2015928, 28741220, -442050620, 7490417768, -136676535840, 2694128185424, -56789020808520, 1278027412615632, -30539597036104512, 772903901239459408
OFFSET
0,4
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Sec[Cosh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 27 2018 *)
CROSSREFS
Sequence in context: A095665 A145346 A184440 * A012778 A302522 A303405
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Jun 27 2018
STATUS
approved