id:A101928 - OEIS Search Results

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A101928

Expansion of cos(asinh(x)) = sin(acosh(x)).

+0
2

1, -1, 5, -85, 3145, -204425, 20646925, -2993804125, 589779412625, -151573309044625, 49261325439503125, -19753791501240753125, 9580588878101765265625, -5527999782664718558265625 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Absolute values are expansion of cosh(asin(x)).`
	EXAMPLE	`cos(asinh(x)) = 1 - x^2/2 + 5x^4/4! - 85x^6/6! + 3145x^8/8! -...`
	CROSSREFS	`Bisection of A006228.` `Sequence in context: A121290 A012743 A139744 this_sequence A012788 A012815 A113107` `Adjacent sequences: A101925 A101926 A101927 this_sequence A101929 A101930 A101931`
	KEYWORD	`sign`
	AUTHOR	`Ralf Stephan, Dec 28 2004`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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