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A009206 Expansion of exp(sin(x))*x. 0
0, 1, 2, 3, 0, -15, -48, -21, 448, 1953, 640, -32461, -152064, 77649, 4331264, 18557595, -46686208, -894805183, -2948087808, 21405607651, 254321049600, 421226202033, -10904188190720, -90171090228021, 96102216892416, 6418365899545825 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..25.

FORMULA

a(n) = n * A002017(n-1). - Ralf Stephan, Sep 01 2003

E.g.f.:  x*E(0) -x, where E(k) = 2 + sin(x)/(2*k+1 - sin(x)/E(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Dec 24 2013

MATHEMATICA

Exp[ Sin[ x ] ]*x

CROSSREFS

Sequence in context: A005160 A085042 A096542 * A318146 A088874 A256304

Adjacent sequences:  A009203 A009204 A009205 * A009207 A009208 A009209

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 February 17 11:57 EST 2019. Contains 320219 sequences. (Running on oeis4.)