id:A074043 - OEIS Search Results

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Denominator of Sum{1/A077800(k)|1<=k<=n}, numerator=A074042.

+0
2

3, 15, 15, 105, 1155, 15015, 255255, 4849845, 140645505, 4360010655, 178760436855, 7686698784765, 453515228301135, 27664428926369235, 1964174453772215685, 143384735125371745005, 14481858247662546245505 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`For n>2, a(n) = A048599(n-1).` `A074042(n)/a(n) -> Brun's constant (A065421).`
	CROSSREFS	`Essentially the same as A048599.` `Sequence in context: A096672 A159983 A133227 this_sequence A120467 A012634 A043060` `Adjacent sequences: A074040 A074041 A074042 this_sequence A074044 A074045 A074046`
	KEYWORD	`nonn,frac`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 13 2002`
	EXTENSIONS	`Edited by Max Alekseyev (maxale(AT)gmail.com), May 10 2009`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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