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A173134 a(n) = Sinh[(2n-1)ArcCosh[n]]^2. 7
-1, 0, 675, 11309768, 878801253135, 208241673295152024, 118270071682117442287235, 137788343929239264227213170608, 295355309179742652677310128859789375 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..8.

FORMULA

a(n) ~ 2^(4*n-4) * n^(4*n-2). - Vaclav Kotesovec, Apr 05 2016

MATHEMATICA

Table[Round[Sinh[(2 n - 1) ArcCosh[n]]^2], {n, 0, 20}]

CROSSREFS

Cf. A058331, A001079, A037270, A071253, A108741, A132592, A146311, A146312, A146313, A173115, A173116, A173121, A173127, A173128, A173129, A173130, A173131, A173133.

Sequence in context: A158393 A294949 A159208 * A258963 A309787 A064963

Adjacent sequences:  A173131 A173132 A173133 * A173135 A173136 A173137

KEYWORD

sign

AUTHOR

Artur Jasinski, Feb 10 2010

STATUS

approved

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Last modified March 8 19:11 EST 2021. Contains 341953 sequences. (Running on oeis4.)