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A009076
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Expansion of e.g.f. cos(tan(x)*exp(x)).
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1
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1, 0, -1, -6, -31, -140, -577, -1498, 6785, 192840, 2667711, 31783730, 353106657, 3771795196, 38270910975, 356214219678, 2639000258561, 4515406498320, -420731049845121, -13553517751217174, -318084517098105631
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OFFSET
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0,4
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 0..250
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MATHEMATICA
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With[{nmax = 30}, CoefficientList[Series[Cos[Tan[x]*Exp[x]], {x, 0, nmax}], x]*Range[0, nmax]!] (* G. C. Greubel, Jul 24 2018 *)
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PROG
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(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
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CROSSREFS
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Sequence in context: A244199 A128568 A079924 * A291396 A012714 A094951
Adjacent sequences: A009073 A009074 A009075 * A009077 A009078 A009079
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KEYWORD
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sign,easy
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AUTHOR
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R. H. Hardin
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EXTENSIONS
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Extended with signs by Olivier Gérard, Mar 15 1997
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STATUS
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approved
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