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A013465 cos(arctan(x)-atanh(x))=1-160/6!*x^6-691200/10!*x^10+3942400/12!*x^12... 0
1, 0, 0, -160, 0, -691200, 3942400, -14125363200, 295206912000, -902471385088000, 43911376404480000, -140627264197754880000, 12856220870209699840000, -45500991975079280640000000 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

CROSSREFS

Sequence in context: A205164 A013454 A013455 * A013466 A060675 A171225

Adjacent sequences:  A013462 A013463 A013464 * A013466 A013467 A013468

KEYWORD

sign

AUTHOR

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

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Last modified February 14 14:47 EST 2012. Contains 205623 sequences.