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A009176 Expansion of cosh(x)*cos(tan(x)). 0
1, 0, -12, -216, -5296, -168128, -5391680, 38412672, 61881368832, 16576603568128, 4120672559178752, 1085659391947229184, 313198080458495610880, 99633528964523733598208, 34860299883730859703910400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..14.

MATHEMATICA

Cosh[ x ]*Cos[ Tan[ x ] ] (* Even Part *)

CROSSREFS

Sequence in context: A034788 A082165 A006689 * A087585 A297503 A214512

Adjacent sequences:  A009173 A009174 A009175 * A009177 A009178 A009179

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified October 17 11:59 EDT 2019. Contains 328110 sequences. (Running on oeis4.)