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A024268 Expansion of tanh(tan(x)*sinh(x))/2. 0
0, 1, 6, -49, -8484, -511379, 6769026, 9445602011, 1884673497336, 61550034487321, -126825694957538754, -61388922632885893849, -9399026972435828464044, 9252373566488286511114501, 9573652356256569791096427066 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

MATHEMATICA

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

CROSSREFS

A009816.

Sequence in context: A143165 A008786 A046195 * A187528 A187699 A187670

Adjacent sequences:  A024265 A024266 A024267 * A024269 A024270 A024271

KEYWORD

sign

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

EXTENSIONS

Extended with signs 03/97.

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.