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A012201 cosh(arctan(arcsin(x)))=1+1/2!*x^2-3/4!*x^4+69/6!*x^6-1159/8!*x^8... 1
1, 1, -3, 69, -1159, 115081, -3250827, 1156388557, -12628752143, 42394317198097, 2830775181039853, 4335882574518729045, 967557162609958010985, 1031578849176135526526105 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Sequence in context: A219070 A086223 A089455 * A284058 A012096 A012074

Adjacent sequences:  A012198 A012199 A012200 * A012202 A012203 A012204

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified December 12 20:04 EST 2017. Contains 295954 sequences.