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Search: id:A013455
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A013455 sec(tan(x)-tanh(x))=1+160/6!*x^6+261120/10!*x^10+19712000/12!*x^12... +0
1
1, 0, 0, 160, 0, 261120, 19712000, 1538068480, 557613056000, 72297758064640, 26395258519552000, 9009548633571328000, 3030117499561574400000, 1720760994441294994472960, 838542041341593366036480000 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Sequence in context: A121800 A121804 A013454 this_sequence A013465 A013466 A060675

Adjacent sequences: A013452 A013453 A013454 this_sequence A013456 A013457 A013458

KEYWORD

nonn

AUTHOR

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

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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