id:A106832 - OEIS Search Results

Search: id:A106832

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2n and 3n alternatively.

+0
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2, 6, 6, 12, 10, 18, 14, 24, 18, 30, 22, 36, 26, 42, 30, 48, 34, 54, 38, 60, 42, 66, 46, 72, 50, 78, 54, 84, 58, 90, 62, 96, 66, 102, 70, 108, 74, 114, 78, 120, 82, 126, 86, 132, 90, 138, 94, 144, 98, 150 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = n*(3-mod(n, 2))`
	MAPLE	`a:=n->add(2+add((-1)^j, j=2..n), j=1..n):seq(a(n), n=1..69); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 13 2008]`
	CROSSREFS	`Sequence in context: A099027 A134466 A062562 this_sequence A129902 A087560 A071892` `Adjacent sequences: A106829 A106830 A106831 this_sequence A106833 A106834 A106835`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 19 2005`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research