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Search: id:A013513
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A013513 cosh(sec(x)-sech(x)) = 1+12/4!*x^4+8512/8!*x^8+34406592/12!*x^12... +0
1
1, 12, 8512, 34406592, 471749623552, 16325059994068992, 1187794482738667098112, 160833904474220565517811712 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A009173 A012531 A013481 this_sequence A013480 A107254 A012532

Adjacent sequences: A013510 A013511 A013512 this_sequence A013514 A013515 A013516

KEYWORD

nonn

AUTHOR

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

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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