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Search: id:A012193
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A012193 sech(arctan(sin(x)))=1-1/2!*x^2+17/4!*x^4-721/6!*x^6+58337/8!*x^8... +0
3
1, -1, 17, -721, 58337, -7657441, 1482169457, -396854618161, 140415423261377, -63432792091634881, 35619694647751942097, -24334169873267896659601, 19872330538404158435859617 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A012137 A012182 A012029 this_sequence A128274 A012085 A012221

Adjacent sequences: A012190 A012191 A012192 this_sequence A012194 A012195 A012196

KEYWORD

sign

AUTHOR

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

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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