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A097234 Numerators of coefficients in cosh(x) / sin(x) power series. 1
-1, 2, 13, 19, 29, 13, 254983, 2593, 137561, 65082637, 7254146201, 390121079, 1870450393439, 109336409527, 10204882558837, 163634261622076159, 75160931938786203761, 31012919260504739, 1378721049267804056272181 (list; graph; refs; listen; history; text; internal format)
OFFSET

-1,2

LINKS

Table of n, a(n) for n=-1..17.

EXAMPLE

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

CROSSREFS

Cf. A097235, A069853. Bisection of A007418.

Sequence in context: A019343 A119570 A018485 * A122139 A122136 A168672

Adjacent sequences:  A097231 A097232 A097233 * A097235 A097236 A097237

KEYWORD

sign,frac

AUTHOR

Ralf Stephan, Aug 01 2004

STATUS

approved

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Last modified May 25 08:26 EDT 2020. Contains 334585 sequences. (Running on oeis4.)