A007301 From expansion of exp(sin x). (Formerly M2296)

1, 1, -3, -3, 217, -2951, 5973, 1237173, -52635599, 1126610929, 20058390573, -3920482183827, 256734635981833, -8529964147714967, -383670903748980603, 99786978811973617701, -10380441423510120242591, 594094494902602207843297

Offset

0,3

References

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=0..17.

Formula

a(n) = A002017(2n).

Mathematica

With[{nn=40}, Take[CoefficientList[Series[Exp[Sin[x]], {x, 0, nn}], x] Range[ 0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Dec 22 2018 *)

Crossrefs

Sequence in context: A273925 A113457 A113466 * A009715 A344283 A335258

Adjacent sequences: A007298 A007299 A007300 * A007302 A007303 A007304

Keyword

sign,easy

Author

N. J. A. Sloane

Extensions

Extended with signs by Christian G. Bower, Oct 1998

Status

approved