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A012247 exp(sinh(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4-4/5!*x^5+21/6!*x^6... 0
1, 1, 1, 0, -3, -4, 21, 136, 185, -7408, -67159, 644416, 11805621, -84562880, -2380474563, 15811723136, 591392066161, -4005496370944, -181472052075695, 1317763889887232, 68002767860495981 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

CROSSREFS

Sequence in context: A081698 A012123 A012255 * A057791 A167452 A122660

Adjacent sequences:  A012244 A012245 A012246 * A012248 A012249 A012250

KEYWORD

sign

AUTHOR

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

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Last modified February 14 15:25 EST 2012. Contains 205627 sequences.