id:A051013 - OEIS Search Results

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Number of nonaveraging sequences on {1,2,...,n}.

+0
4

1, 2, 4, 7, 13, 23, 40, 65, 106, 169, 278, 443, 705, 1117, 1760, 2692, 4151, 6314, 9526, 14127, 20944, 30848, 45589, 66495, 96847, 140840, 204380, 293822, 425859 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	EXAMPLE	`The only subset of s = {1,2,3} that contains a 3-term arithmetic progression is s itself, so a(3) = 7.`
	CROSSREFS	`Sequence in context: A054150 A130709 A073832 this_sequence A128609 A114832 A136299` `Adjacent sequences: A051010 A051011 A051012 this_sequence A051014 A051015 A051016`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`
	EXTENSIONS	`More terms from John W. Layman (layman(AT)math.vt.edu), Nov 27 2001`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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