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A102073 Numerators of e.g.f. sec(arcosh(x)) = cosec(arsinh(x)). 1
1, -1, 220, -830, 51280, -24271600, 2978372800, -72656038000, 6574942704928000, -369025338813664000, 439973927875730560000, -16173932272478277440000, 8586787143256164544000000 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

EXAMPLE

sec(arcosh(x)) = 1/x + x/3 - 1/3*x^3/3! + 220/63*x^5/5! -...

CROSSREFS

Denominators are in A102074.

Sequence in context: A175738 A184543 A135807 * A002025 A180219 A027797

Adjacent sequences:  A102070 A102071 A102072 * A102074 A102075 A102076

KEYWORD

sign,frac

AUTHOR

Ralf Stephan, Dec 31 2004

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Last modified February 17 06:13 EST 2012. Contains 205991 sequences.