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A009729 Expansion of tan(x)*cos(tan(x)). 0
1, -1, -39, -1233, -50831, -2696321, -173033847, -12037460945, -631883857695, 72323545938047, 51175586766916153, 20871009809650906031, 8144386597628284974161, 3320626270273875548979455 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 16 18:53 EST 2019. Contains 320165 sequences. (Running on oeis4.)