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A024229 Expansion of tanh(x)*sin(tan(x))/2. 0
0, 1, -2, 19, -1572, -24763, -5174758, -230357353, -45947071688, -3138700558071, -787255563055690, -40961532387015781, -13644908739614623724, 5015831039379054245197, 1910018990150165668013778, 1856616739480127236630886175, 892801482776535024911075390576 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..16.

MATHEMATICA

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

CROSSREFS

Cf. A009834.

Sequence in context: A012976 A013107 A172028 * A094663 A274762 A091688

Adjacent sequences:  A024226 A024227 A024228 * A024230 A024231 A024232

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs, Mar 1997

STATUS

approved

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Last modified October 26 12:28 EDT 2020. Contains 338027 sequences. (Running on oeis4.)