OFFSET
0,5
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..250
MAPLE
seq(coeff(series(factorial(n)*cosh(log(1+x)^2), x, n+1), x, n), n=0..20); # Muniru A Asiru, Jul 31 2018
MATHEMATICA
With[{nmax = 30}, CoefficientList[Series[Cosh[Log[1 + x]^2], {x, 0, nmax}], x]*Range[0, nmax]!] (* G. C. Greubel, Jul 30 2018 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(cosh(log(1+x)^2))) \\ G. C. Greubel, Jul 30 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!(Cosh(Log(1+x)^2))); [Factorial(n-1)*b[n]: n in [1..m]]; // G. C. Greubel, Jul 30 2018
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved