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Search: id:A012466
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A012466 sec(arctan(x)*atan(x))=1+12/4!*x^4-480/6!*x^6+37968/8!*x^8... +0
2
1, 0, 12, -480, 37968, -4773120, 878319552, -222512349696, 74262725323008, -31578556041732096, 16666719859336276992, -10690478515516973015040, 8190555666463900906475520, -7387658525325188387856384000 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012463 A012464 A012465 this_sequence A012467 A012468 A012469

Sequence in context: A012465 A012394 A012686 this_sequence A004801 A067733 A064344

KEYWORD

sign

AUTHOR

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

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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