OFFSET
0,5
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..446
EXAMPLE
E.g.f. = 1 -12/4!*x^4 +60/5!*x^5 -450/6!*x^6 +2940/7!*x^7 + ...
MAPLE
seq(coeff(series(factorial(n)*sech(arcsin(x)*log(x+1)), x, n+1), x, n), n = 0 .. 20); # Muniru A Asiru, Oct 25 2018
MATHEMATICA
With[{nn = 30}, CoefficientList[Series[Sech[ArcSin[x]*Log[x + 1]], {x, 0, nn}], x] Range[0, nn]!] (* G. C. Greubel, Oct 25 2018 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(1/cosh(asin(x)*log(x+1)))) \\ G. C. Greubel, Oct 25 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!( 1/Cosh(Arcsin(x)*Log(x+1)) )); [Factorial(n-1)*b[n]: n in [1..m-1]]; // G. C. Greubel, Oct 25 2018
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved