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Search: id:A012830
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A012830 arctanh(sec(x)*arcsinh(x))=x+4/3!*x^3+88/5!*x^5+4184/7!*x^7... +0
1
1, 4, 88, 4184, 398848, 58835456, 12993783424, 3911934210560, 1562951627091968, 793328025614454784, 501079933291827593216, 384338283691725654392832, 352458553186266111883247616 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Adjacent sequences: A012827 A012828 A012829 this_sequence A012831 A012832 A012833

Sequence in context: A028554 A154137 A154136 this_sequence A012946 A013101 A013067

KEYWORD

nonn

AUTHOR

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

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.

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