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A009162 Expansion of cosh(tan(x).exp(x)). 0
1, 0, 1, 6, 33, 180, 1137, 8218, 68929, 640584, 6534049, 71605710, 842179041, 10543617084, 140430103569, 1979476257442, 29478515793025, 461911114620432, 7600066231728193, 130898815536828438 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

MATHEMATICA

Cosh[ Tan[ x ]*Exp[ x ] ]

CROSSREFS

Sequence in context: A137627 A138395 A050151 * A012718 A297221 A006630

Adjacent sequences:  A009159 A009160 A009161 * A009163 A009164 A009165

KEYWORD

nonn,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested Mar 15 1997 by Olivier Gérard.

STATUS

approved

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Last modified July 5 21:00 EDT 2020. Contains 335473 sequences. (Running on oeis4.)