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Search: id:A012447
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A012447 arctan(atan(x)*tan(x))=2/2!*x^2-80/6!*x^6-2688/8!*x^8+260608/10!*x^10... +0
1
2, 0, -80, -2688, 260608, 2928640, -463763456, -517376835584, 108823739498496, -2683131538178048, 5868236283429519360, -6862655376791380688896, 2738386568702639562817536 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Adjacent sequences: A012444 A012445 A012446 this_sequence A012448 A012449 A012450

Sequence in context: A012647 A012334 A012451 this_sequence A136558 A136559 A009740

KEYWORD

sign

AUTHOR

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

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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