A102061 Numerators of e.g.f.: tan(arccosh(x)) = cot(arcsinh(x)).

-1, -1, 125, -2095, 34195, -33495775, 2103412025, -417444454375, 4782399123480875, -542199533615744875, 325816336080575624375, -48225269288311831665625, 6435989445301225961328125

Offset

1,3

Links

Table of n, a(n) for n=1..13.

Example

tan(arccosh(x)) = 1/x - 1/6*x - 1/12*x^3/3! + 125/126*x^5/5! - ...

Crossrefs

Denominators are in A102062.

Sequence in context: A342349 A017043 A255181 * A080169 A017127 A119633

Adjacent sequences: A102058 A102059 A102060 * A102062 A102063 A102064

Keyword

sign,frac

Author

Ralf Stephan, Dec 28 2004

Status

approved