id:A102244 - OEIS Search Results

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a(n)=exp(-1)*(n+1)!*sum_{i>j>=0}n^j/i!.

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1, 1, 5, 42, 544, 10020, 246840, 7790160, 305234496, 14493790080, 818125056000, 54040182134400, 4122847701941760, 359308852504842240, 35434445974210483200, 3922092526740740352000, 483768942063738966835200 (list; graph; listen)

	OFFSET	`0,3`
	PROGRAM	`(PARI) a(n)=round((n+1)!exp(-1)sum(i1=0, 200, sum(i2=i1+1, 200, i1^n*1./i2!)))`
	CROSSREFS	`Cf. A000110.` `Sequence in context: A102693 A052654 A108398 this_sequence A132487 A067927 A038546` `Adjacent sequences: A102241 A102242 A102243 this_sequence A102245 A102246 A102247`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 18 2005`

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

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