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Search: id:A012675
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A012675 sech(tanh(x)*tan(x))=1-12/4!*x^4+2128/8!*x^8+3482688/12!*x^12... +0
1
1, -12, 2128, 3482688, -28510476032, -29203453996032, 18429307563035250688, -709977989050867131727872 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A011920 A004823 A009063 this_sequence A101812 A064074 A005249

Adjacent sequences: A012672 A012673 A012674 this_sequence A012676 A012677 A012678

KEYWORD

sign

AUTHOR

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

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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