A009478 Expansion of sin(sin(x))*x.

0, 2, -8, 72, -1024, 18720, -451200, 13870976, -517341184, 22907884032, -1190546278400, 71557772290048, -4904509780131840, 379465209995010048, -32882543112668741632, 3167852772782079836160, -336982188500401608720384

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: A060635 A364408 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