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A009478 Expansion of sin(sin(x))*x. 1
0, 2, -8, 72, -1024, 18720, -451200, 13870976, -517341184, 22907884032, -1190546278400, 71557772290048, -4904509780131840, 379465209995010048, -32882543112668741632, 3167852772782079836160, -336982188500401608720384 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

MATHEMATICA

Sin[ Sin[ x ] ]*x (* Even Part *)

CROSSREFS

Equals 2 * A024253(n).

Sequence in context: A026739 A060635 A194499 * A038057 A107270 A294351

Adjacent sequences:  A009475 A009476 A009477 * A009479 A009480 A009481

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)