id:A101927 - OEIS Search Results

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A101927

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

+0
2

1, -2, 20, -520, 26000, -2132000, 260104000, -44217680000, 9993195680000, -2898026747200000, 1049085682486400000, -463695871658988800000, 245758811979264064000000, -153845016299019304064000000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Absolute values are expansion of sinh(asin(x)).`
	EXAMPLE	`sin(asinh(x)) = x - 2x^3/3! + 20x^5/5! - 520x^7/7! + 26000x^9/9! -..`
	CROSSREFS	`Bisection of A006228.` `Sequence in context: A103353 A009344 A009699 this_sequence A009399 A009182 A015207` `Adjacent sequences: A101924 A101925 A101926 this_sequence A101928 A101929 A101930`
	KEYWORD	`sign`
	AUTHOR	`Ralf Stephan, Dec 28 2004`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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