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A068918 Denominators of coefficients in 1/sin(x) - 1/sinh(x) power series. 2
3, 7560, 1710720, 18681062400, 1277273554292736000, 71944387956080640000, 46533630129992957952000000, 189947572911510017089460502528000000, 161800949418855027866798653440000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..112

MATHEMATICA

Select[Denominator[CoefficientList[Series[1/Sin[x] - 1/Sinh[x], {x, 0, 50}], x]], # != 1 &] (* G. C. Greubel, Nov 11 2016 *)

CROSSREFS

Cf. A068917.

Sequence in context: A134776 A062595 A128147 * A158036 A242865 A280300

Adjacent sequences:  A068915 A068916 A068917 * A068919 A068920 A068921

KEYWORD

easy,frac,nonn

AUTHOR

Benoit Cloitre, Mar 29 2002

STATUS

approved

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Last modified April 18 22:08 EDT 2019. Contains 322237 sequences. (Running on oeis4.)