id:A080833 - OEIS Search Results

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Expansion of the exponential series Exp[ x/(1 - x - x^2) ].

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1, 1, 3, 19, 145, 1401, 16051, 213403, 3223809, 54514225, 1019601091, 20890209891, 465156779473, 11181638663209, 288536019179955, 7953590111627371, 233211718410856321, 7246720953253750113 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`E.G.F. Exp[ x/(1 - x - x^2) ]` `a(n)=n!*sum{i=0..n, sum{j=0..n, C(i+j-1, j)C(j, n-i-j)/i!}}; - Paul Barry (pbarry(AT)wit.ie), Aug 29 2005`
	CROSSREFS	`Sequence in context: A110525 A058859 A095002 this_sequence A073516 A005258 A131551` `Adjacent sequences: A080830 A080831 A080832 this_sequence A080834 A080835 A080836`
	KEYWORD	`easy,nonn`
	AUTHOR	`Emanuele Munarini (munarini(AT)mate.polimi.it), Mar 28 2003`

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

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