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Search: id:A012851
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A012851 sec(sec(x)*arctanh(x))=1+1/2!*x^2+25/4!*x^4+1225/6!*x^6+108113/8!*x^8... +0
1
1, 1, 25, 1225, 108113, 15283505, 3167087273, 904365439289, 340377095938337, 163284306442648801, 97251848546749385145, 70412470931263247515689, 60905917762268697815507057, 62032377805368358044198610705 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012848 A012849 A012850 this_sequence A012852 A012853 A012854

Sequence in context: A120694 A012809 A014769 this_sequence A096330 A042203 A042200

KEYWORD

nonn

AUTHOR

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

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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