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A009076 Expansion of e.g.f. cos(tan(x)*exp(x)). 1
1, 0, -1, -6, -31, -140, -577, -1498, 6785, 192840, 2667711, 31783730, 353106657, 3771795196, 38270910975, 356214219678, 2639000258561, 4515406498320, -420731049845121, -13553517751217174, -318084517098105631 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..250

MATHEMATICA

With[{nmax = 30}, CoefficientList[Series[Cos[Tan[x]*Exp[x]], {x, 0, nmax}], x]*Range[0, nmax]!] (* G. C. Greubel, Jul 24 2018 *)

PROG

(PARI) x='x+O('x^30); Vec(serlaplace(cos(tan(x)*exp(x)))) \\ G. C. Greubel, Jul 24 2018

(MAGMA) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!(Cos(Tan(x)*Exp(x)))); [Factorial(n-1)*b[n]: n in [1..m]]; // G. C. Greubel, Jul 24 2018

CROSSREFS

Sequence in context: A244199 A128568 A079924 * A291396 A012714 A094951

Adjacent sequences:  A009073 A009074 A009075 * A009077 A009078 A009079

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified January 21 03:16 EST 2021. Contains 340332 sequences. (Running on oeis4.)