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Search: id:A012818
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A012818 arctanh(sec(x)*sinh(x))=x+6/3!*x^3+140/5!*x^5+8456/7!*x^7... +0
1
1, 6, 140, 8456, 957840, 174293856, 46514037440, 17115342333056, 8304761365213440, 5137820023434733056, 3947233200665413667840, 3686931444647916864505856, 4114664615209642258282352640 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A123729 A123728 A012785 this_sequence A078450 A059488 A067196

Adjacent sequences: A012815 A012816 A012817 this_sequence A012819 A012820 A012821

KEYWORD

nonn

AUTHOR

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

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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