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URL: https://oeis.org/A009649

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A009649

Expansion of tan(log(1+x)*cos(x)).

0

0, 1, -1, 1, -12, 35, -195, 1979, -13552, 131333, -1540845, 16920341, -219934044, 3138657015, -46097651327, 745768998623, -12886218266880, 233789283755465, -4532667637516281, 92739558324236905, -1991654643609977740

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

LINKS

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

MATHEMATICA

Tan[ Log[ 1+x ]*Cos[ x ] ]

CROSSREFS

Sequence in context: A367344 A195542 A103472 * A195539 A007794 A008653

Adjacent sequences: A009646 A009647 A009648 * A009650 A009651 A009652

KEYWORD

sign,easy

AUTHOR

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved