A097235 Denominators of coefficients in cosh(x) / sin(x) power series.

1, 3, 90, 945, 12600, 53460, 10216206000, 1021620600, 534386160000, 2494674910728000, 2744142401800800000, 1456506351725040000, 68921880563628892800000, 39762623402093592000000

Offset

-1,2

Links

Table of n, a(n) for n=-1..12.

Example

cosh(x)/sin(x) = -1/x + 2/3*x + 13/90*x^3 + 19/945*x^5 +...

Crossrefs

Cf. A097234, A069854. Bisection of A007451.

Sequence in context: A116336 A254083 A103305 * A047686 A013304 A013298

Adjacent sequences: A097232 A097233 A097234 * A097236 A097237 A097238

Keyword

nonn,frac

Author

Ralf Stephan, Aug 01 2004

Status

approved