A009673 Expansion of tan(sin(x)*x).

0, 2, -4, 246, -6728, 614890, -55387212, 8450249822, -1527219657616, 372125006557650, -109398463655126420, 39693749843486489542, -17074884680310522056664, 8684084243275368565840826

Offset

0,2

Links

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

Mathematica

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

Crossrefs

Sequence in context: A110067 A145996 A005275 * A018770 A260755 A173566

Adjacent sequences: A009670 A009671 A009672 * A009674 A009675 A009676

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved