A024244 Expansion of tan(sin(x)*x)/2.

0, 1, -2, 123, -3364, 307445, -27693606, 4225124911, -763609828808, 186062503278825, -54699231827563210, 19846874921743244771, -8537442340155261028332, 4342042121637684282920413

Offset

0,3

Links

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

Mathematica

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

Crossrefs

Cf. A009673.

Sequence in context: A249503 A249504 A230586 * A088055 A065705 A012870

Adjacent sequences: A024241 A024242 A024243 * A024245 A024246 A024247

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs Mar 1997

Status

approved