id:A102059 - OEIS Search Results

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A102059

Expansion of cos(atanh(x)).

+0
2

1, -1, -7, -145, -6095, -433025, -46676375, -7108596625, -1454225641375, -384836032842625, -127950804666254375, -52219402100109700625, -25668587693366081579375, -14959038795678519196890625 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`cos(atanh(x)) = 1 - x^2/2 - 7x^4/4! - 145x^6/6! - 6095x^8/8! -...`
	CROSSREFS	`Bisection of A002019.` `Sequence in context: A156978 A163028 A012826 this_sequence A064624 A048935 A152552` `Adjacent sequences: A102056 A102057 A102058 this_sequence A102060 A102061 A102062`
	KEYWORD	`sign`
	AUTHOR	`Ralf Stephan, Dec 28 2004`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research