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Search: id:A013090
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A013090 sec(arcsinh(x)+arcsin(x))=1+4/2!*x^2+80/4!*x^4+4120/6!*x^6... +0
1
1, 4, 80, 4120, 394880, 61069600, 13845756800, 4331363670400, 1786609560320000, 939754328209216000, 613833877949676800000, 487486352498634760960000, 462560462591422971975680000 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A013031 A012923 A012922 this_sequence A012042 A013139 A013007

Adjacent sequences: A013087 A013088 A013089 this_sequence A013091 A013092 A013093

KEYWORD

nonn

AUTHOR

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

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Last modified December 6 19:58 EST 2009. Contains 170429 sequences.

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