id:A109043 - OEIS Search Results

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LCM(n,2).

+0
2

0, 2, 2, 6, 4, 10, 6, 14, 8, 18, 10, 22, 12, 26, 14, 30, 16, 34, 18, 38, 20, 42, 22, 46, 24, 50, 26, 54, 28, 58, 30, 62, 32, 66, 34, 70, 36, 74, 38, 78, 40, 82, 42, 86, 44, 90, 46, 94, 48, 98, 50, 102, 52, 106, 54, 110, 56, 114, 58, 118, 60, 122, 62, 126, 64, 130, 66, 134 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = n2/GCD(n, 2).` `a(n)=-(n((-1)^n-3))/2 - Stephen Crowley (crow(AT)crowlogic.net), Feb 11 2007`
	CROSSREFS	`Cf. A109042.` `Adjacent sequences: A109040 A109041 A109042 this_sequence A109044 A109045 A109046` `Sequence in context: A071059 A061108 A053213 this_sequence A054585 A046203 A100495`
	KEYWORD	`nonn,easy`
	AUTHOR	`Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu), Jun 18 2005`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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