id:A081921 - OEIS Search Results

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A081921

Expansion of exp(3x)/sqrt(1-x^2).

+0
3

1, 3, 10, 36, 144, 648, 3384, 20520, 145728, 1181952, 10917504, 111601152, 1265777280, 15544566144, 208320719616, 2980582728192, 46020833427456, 751100760576000, 13121167636058112, 240473024248393728 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Binomial transform of A081920`
	FORMULA	`E.g.f. exp(3x)/sqrt(1-x^2)` `a(n) = 3^nn!Sum_{k=0..floor(n/2)} binomial(2k, k)/(n-2k)!/36^k. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 11 2003`
	CROSSREFS	`Cf. A081922.` `Sequence in context: A129156 A002212 A129247 this_sequence A010373 A104603 A080625` `Adjacent sequences: A081918 A081919 A081920 this_sequence A081922 A081923 A081924`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 01 2003`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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