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A013359
sech(sin(x)-tan(x))=1-90/6!*x^6-2520/8!*x^8-126630/10!*x^10...
0
1, 0, 0, -90, -2520, -126630, -2243340, 382612230, 134674853040, 26271944587890, 4394379581092620, 324925984573170750, -181350289825568364600, -145875833202121504544790
OFFSET
0,4
CROSSREFS
Sequence in context: A055603 A210090 A109124 * A013355 A013357 A013358
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved