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A012032 sec(sin(sinh(x)))=1+1/2!*x^2+5/4!*x^4+13/6!*x^6-1303/8!*x^8... 0
1, 1, 5, 13, -1303, -97351, -5539667, -182565627, 23677748561, 8153921374705, 1571128609968341, 190412412110488701, -16146953133290647751, -22882305147029329939799 (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: A009157 A153374 A247789 * A121228 A201260 A012173

Adjacent sequences:  A012029 A012030 A012031 * A012033 A012034 A012035

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified May 23 12:45 EDT 2017. Contains 286915 sequences.