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Search: id:A012837
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A012837 arctanh(sec(x)*tanh(x))=x+3/3!*x^3+65/5!*x^5+2723/7!*x^7... +0
1
1, 3, 65, 2723, 226785, 29857443, 5785047905, 1544546456963, 543833037679425, 244141035610073283, 136105726320473657345, 92251004006663786578403, 74707241586539626288837665 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Adjacent sequences: A012834 A012835 A012836 this_sequence A012838 A012839 A012840

Sequence in context: A084883 A112000 A012804 this_sequence A036778 A065400 A091470

KEYWORD

nonn

AUTHOR

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

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Last modified May 13 01:46 EDT 2008. Contains 139661 sequences.

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