A012472 Expansion of e.g.f.: sec(cos(x)*log(x+1))=1+1/2!*x^2-3/3!*x^3+4/4!*x^4-40/5!*x^5...

1, 0, 1, -3, 4, -40, 250, -1260, 14012, -133992, 1310660, -16809980, 215083592, -2938291200, 45330896832, -728363224680, 12475447944528, -230003712851648, 4451144492528080, -91010462837366448

Offset

0,4

Links

Table of n, a(n) for n=0..19.

Mathematica

With[{nn=20}, CoefficientList[Series[Sec[Cos[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 24 2014 *)

Crossrefs

Sequence in context: A088168 A032836 A167760 * A012876 A300882 A348225

Adjacent sequences: A012469 A012470 A012471 * A012473 A012474 A012475

Keyword

sign

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Extensions

Definition clarified by Harvey P. Dale, Dec 24 2014

Status

approved