id:A121564 - OEIS Search Results

Search: id:A121564

Displaying 1-1 of 1 results found.

page 1

Denominator of Sum[i=1..n] i!/(i^i).

+0
2

1, 2, 18, 288, 180000, 1620000, 190591380000, 780662292480000, 46097327708651520000, 28810829817907200000000, 747278726094210559615027200000000, 747278726094210559615027200000000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Numerators are A121563. Limit as n approaches infinity of A121563(n)/A121564(n) = 1.879853862175258533486306145... whose decimal expansion is A094082.`
	FORMULA	`Denominator of Sum[i=1..n] i!/(i^i) A000142(i)/A000312(i).`
	EXAMPLE	`a(1) = 1/1 = 1.` `a(2) = 3/2 = 1.5` `a(3) = 31/18 = 1.72222222222.` `a(4) = 523/288 = 1.81597222222.` `a(5) = 333787/180000 = 1.85437222222.`
	CROSSREFS	`Cf. A000142, A000312, A055775, A094082.` `Sequence in context: A131455 A084947 A123385 this_sequence A092563 A087215 A090307` `Adjacent sequences: A121561 A121562 A121563 this_sequence A121565 A121566 A121567`
	KEYWORD	`easy,frac,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost2(AT)yahoo.com), Aug 07 2006`

page 1

Search completed in 0.002 seconds

Last modified September 6 09:40 EDT 2008. Contains 143480 sequences.

AT&T Labs Research