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A012084 cosh(arcsin(tan(x)))=1+1/2!*x^2+13/4!*x^4+421/6!*x^6+26713/8!*x^8... 0
1, 1, 13, 421, 26713, 2871241, 473357413, 111506036461, 35624155784113, 14838126699784081, 7813931867856058813, 5076900281143623362101, 3989607021222775392853513, 3730016905780866035656178521 (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: A100872 A012045 A012109 * A114759 A260871 A260851

Adjacent sequences:  A012081 A012082 A012083 * A012085 A012086 A012087

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified August 3 01:55 EDT 2021. Contains 346429 sequences. (Running on oeis4.)