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A009416 Expansion of log(1+x)*cosh(x). 2
0, 1, -1, 5, -12, 49, -225, 1301, -8848, 69441, -616185, 6095429, -66475596, 792143793, -10238194057, 142633278997, -2130537219840, 33964965659649, -575573407212753, 10331348137881349, -195807849389362540 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(n) ~ (n-1)! * (-1)^(n+1) * cosh(1). - Vaclav Kotesovec, Jan 23 2015

MATHEMATICA

Log[ 1+x ]*Cosh[ x ]

CoefficientList[Series[Cosh[x]*Log[1 + x], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)

CROSSREFS

Sequence in context: A254217 A211951 A009425 * A332477 A240389 A135769

Adjacent sequences:  A009413 A009414 A009415 * A009417 A009418 A009419

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified January 19 23:39 EST 2022. Contains 350467 sequences. (Running on oeis4.)