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A009568 Expansion of sinh(ln(1+sinh(x))). 0
0, 1, -1, 4, -16, 91, -616, 4894, -44416, 453541, -5145856, 64222984, -874402816, 12897183391, -204862698496, 3486535686274, -63292764553216, 1220795601029641, -24931903045697536, 537463528325234764 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

FORMULA

a(2n) = A006154(2n)/2, n>0. - R. Stephan, Apr 29 2004

MATHEMATICA

Sinh[ Log[ 1+Sinh[ x ] ] ]

CROSSREFS

Sequence in context: A052124 A013030 A124962 * A139155 A003762 A143501

Adjacent sequences:  A009565 A009566 A009567 * A009569 A009570 A009571

KEYWORD

sign,easy

AUTHOR

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

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gerard.

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Last modified February 15 08:10 EST 2012. Contains 205722 sequences.