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A012448
cos(arctan(x)*tan(x))=1-12/4!*x^4-7280/8!*x^8+241920/10!*x^10...
0
1, 0, -12, 0, -7280, 241920, -39796416, 5601756160, -1164660739840, 326680627961856, -107144725837171712, 45897715016709799936, -22689657885234118356992, 13649678748377009638277120
OFFSET
0,3
CROSSREFS
Sequence in context: A265087 A012337 A012339 * A012338 A012453 A284453
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved