id:A101485 - OEIS Search Results

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(4n)! / [4^n * (2n)! ].

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1, 3, 105, 10395, 2027025, 654729075, 316234143225, 213458046676875, 191898783962510625, 221643095476699771875, 319830986772877770815625, 563862029680583509947946875, 1192568192774434123539907640625 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`sin(arcsin(2x)/2) = x + 3x^3/3! + 105x^5/5! + 10395x^7/7! +...`
	CROSSREFS	`Bisection of A001147. Odd part of A009120.` `Sequence in context: A050651 A103037 A075528 this_sequence A074072 A037115 A139921` `Adjacent sequences: A101482 A101483 A101484 this_sequence A101486 A101487 A101488`
	KEYWORD	`nonn,easy`
	AUTHOR	`Ralf Stephan, Jan 21 2005`

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

AT&T Labs Research