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Search: id:A012451
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A012451 tanh(arctan(x)*tan(x))=2/2!*x^2-80/6!*x^6-2688/8!*x^8+18688/10!*x^10... +0
1
2, 0, -80, -2688, 18688, 2928640, 827766784, -52425949184, 11263759220736, -6439993741672448, 1974174235078164480, -952764420869394006016, 577855093673994995367936, -371995357739088472730238976 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Adjacent sequences: A012448 A012449 A012450 this_sequence A012452 A012453 A012454

Sequence in context: A030129 A012647 A012334 this_sequence A012447 A136558 A136559

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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