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A013414
sec(arcsin(x)-arctan(x))=1+90/6!*x^6-2520/8!*x^8+368550/10!*x^10...
0
1, 0, 0, 90, -2520, 368550, -24324300, 6214858650, -725350626000, 318282066852750, -56464293738352500, 40214549353890161250, -9894502805503110795000, 10823754426851479957593750
OFFSET
0,4
CROSSREFS
Sequence in context: A013355 A013357 A013358 * A013413 A013411 A013415
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved