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A009375 Expansion of ln(1+tan(x)*cosh(x)). 0
0, 1, -1, 7, -26, 165, -1216, 10827, -111376, 1316585, -17441536, 257028847, -4164440576, 73616009805, -1409649350656, 29070305745267, -642306123237376, 15137914082015825, -379068323095576576, 10050622525103392087 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

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

CROSSREFS

Sequence in context: A232605 A026683 A197053 * A009380 A183329 A166406

Adjacent sequences:  A009372 A009373 A009374 * A009376 A009377 A009378

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gérard.

STATUS

approved

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Last modified September 17 22:38 EDT 2014. Contains 246886 sequences.