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A024285 Expansion of tanh(sin(x))*sin(x)/2. 0
0, 1, -8, 144, -5184, 305152, -26442752, 3162378240, -498850234368, 100338708840448, -25063296518586368, 7611477148997517312, -2761834207318131081216, 1180050998603017168617472 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

Tanh[ Sin[ x ] ]*Sin[ x ]/2 (* Even Part *)

CROSSREFS

Cf. A009795.

Sequence in context: A124059 A052764 A024284 * A111687 A231851 A071305

Adjacent sequences:  A024282 A024283 A024284 * A024286 A024287 A024288

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs Mar 1997

STATUS

approved

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Last modified February 25 12:44 EST 2018. Contains 299654 sequences. (Running on oeis4.)