A009729 Expansion of tan(x)*cos(tan(x)).

1, -1, -39, -1233, -50831, -2696321, -173033847, -12037460945, -631883857695, 72323545938047, 51175586766916153, 20871009809650906031, 8144386597628284974161, 3320626270273875548979455

Offset

0,3

Links

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

Mathematica

Tan[ x ]*Cos[ Tan[ x ] ] (* Odd Part *)

Crossrefs

Sequence in context: A014936 A227524 A240442 * A078970 A020303 A235973

Adjacent sequences: A009726 A009727 A009728 * A009730 A009731 A009732

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved