OFFSET
0,5
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..450
EXAMPLE
E.g.f. = 1 - 12*x^4/4! + 60*x^5/5! - 210*x^6/6! + 1260*x^7/7! + ...
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Sech[Sin[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 30 2015 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(1/cosh(sin(x)*log(x+1)))) \\ G. C. Greubel, Oct 26 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!( 1/Cosh(Sin(x)*Log(x+1)) )); [Factorial(n-1)*b[n]: n in [1..m-1]]; // G. C. Greubel, Oct 26 2018
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, May 30 2015
STATUS
approved