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A013331 arctan(exp(x)-sec(x))=x-1/3!*x^3-4/4!*x^4+5/5!*x^5+60/6!*x^6... 0
1, 0, -1, -4, 5, 60, -61, -2504, -8695, 100920, 873479, -6889804, -142058995, -4843020, 19728547019, 98903242096, -3531831462895, -49401992303760, 493517141932559, 17048746833049196, -29344831492412395 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

CROSSREFS

Sequence in context: A042383 A135799 A041941 * A042425 A105288 A109348

Adjacent sequences:  A013328 A013329 A013330 * A013332 A013333 A013334

KEYWORD

sign

AUTHOR

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

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.