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A012388 arcsin(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+392/6!*x^6+21376/8!*x^8... 1
2, 16, 392, 21376, 2117792, 333550336, 76433892992, 23981418704896, 9862199971860992, 5144452992189485056, 3317894031273853601792, 2591931617534673513250816, 2411532576645611695219515392 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

CROSSREFS

Sequence in context: A172149 A012390 A009613 * A012752 A188904 A189104

Adjacent sequences:  A012385 A012386 A012387 * A012389 A012390 A012391

KEYWORD

nonn

AUTHOR

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

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.