A102062 Denominators of e.g.f.: tan(arccosh(x)) = cot(arcsinh(x)).

6, 12, 126, 72, 22, 252, 126, 144, 7182, 2772, 4554, 1512, 378, 84, 14322, 2464, 42, 14364, 342, 792, 1251558, 191268, 136206, 21168, 594, 1188, 33858, 1368, 1062, 257796, 128898, 6336, 6407478, 17388, 295218, 948024, 79002, 158004, 89586

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Example

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

Crossrefs

Numerators are in A102061.

Sequence in context: A051586 A228858 A102077 * A164584 A156432 A070020

Adjacent sequences: A102059 A102060 A102061 * A102063 A102064 A102065

Keyword

nonn,frac

Author

Ralf Stephan, Dec 28 2004

Status

approved