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Search: id:A012131
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A012131 cosh(arcsin(tanh(x)))=1+1/2!*x^2-3/4!*x^4+21/6!*x^6-263/8!*x^8... +0
1
1, 1, -3, 21, -263, 4841, -99723, -199939, 501445617, -101818966319, 19731909099757, -4192563651606299, 1009030667701246697, -277080625752723191879, 86724157841631252590437 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Sequence in context: A138903 A058562 A138213 this_sequence A098278 A066206 A130032

Adjacent sequences: A012128 A012129 A012130 this_sequence A012132 A012133 A012134

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.


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