A173134 a(n) = Sinh[(2n-1)ArcCosh[n]]^2.

-1, 0, 675, 11309768, 878801253135, 208241673295152024, 118270071682117442287235, 137788343929239264227213170608, 295355309179742652677310128859789375

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: A294949 A159208 A358174 * A258963 A309787 A064963

Adjacent sequences: A173131 A173132 A173133 * A173135 A173136 A173137

Keyword

sign

Author

Artur Jasinski, Feb 10 2010

Status

approved