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A013089 cos(arcsinh(x)+arcsin(x))=1-4/2!*x^2+16/4!*x^4-280/6!*x^6+8320/8!*x^8... 0
1, -4, 16, -280, 8320, -628000, 51414400, -8930646400, 1426497280000, -444950339392000, 117131784689920000, -57406016313168640000, 22526613550121973760000, -15953943354322290304000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A152153 A144988 A067172 * A203105 A273474 A095956

Adjacent sequences: A013086 A013087 A013088 * A013090 A013091 A013092

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified November 26 21:15 EST 2022. Contains 358362 sequences. (Running on oeis4.)