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Search: id:A013466
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A013466 sec(arctan(x)-atanh(x))=1+160/6!*x^6+691200/10!*x^10+19712000/12!*x^12... +0
1
1, 0, 0, 160, 0, 691200, 19712000, 14125363200, 1476034560000, 949310881792000, 219556882022400000, 161772486589808640000, 65109683806263050240000, 58457850571785240576000000 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Sequence in context: A013454 A013455 A013465 this_sequence A060675 A127338 A138854

Adjacent sequences: A013463 A013464 A013465 this_sequence A013467 A013468 A013469

KEYWORD

nonn

AUTHOR

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

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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