id:A058005 - OEIS Search Results

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a(n)=GCD[n,C(2n,n)].

+0
2

2, 2, 2, 2, 2, 12, 2, 2, 2, 4, 2, 4, 2, 4, 30, 2, 2, 12, 2, 20, 6, 4, 2, 12, 2, 4, 2, 56, 2, 4, 2, 2, 6, 4, 14, 4, 2, 4, 2, 20, 2, 84, 2, 8, 90, 4, 2, 12, 2, 4, 6, 8, 2, 12, 2, 8, 6, 4, 2, 24, 2, 4, 6, 2, 10, 132, 2, 4, 6, 20, 2, 36, 2, 4, 30, 8, 154, 12, 2, 20, 2, 4, 2, 56, 10, 4, 6, 88, 2, 20 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`a(n)=2 for values like 1,2,3,4,5,7,.. a(n)=2n for values like 6,15,...,190`
	CROSSREFS	`A001405.` `Sequence in context: A157279 A010671 A088050 this_sequence A095386 A060359 A029665` `Adjacent sequences: A058002 A058003 A058004 this_sequence A058006 A058007 A058008`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Nov 13 2000`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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