id:A088811 - OEIS Search Results

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Number of subsets of {1, ..., n} that are sum-free but not double-free.

+0
3

0, 0, 1, 1, 4, 6, 13, 19, 41, 54, 110, 157, 277, 394, 706, 970, 1691, 2376, 3905, 5494, 9130, 12355, 20262, 28146, 44316, 61761, 98023, 132891 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`a(n) = A088808(n) - A088812(n) = A085489(n) - A007865(n).`
	LINKS	`Eric Weisstein's World of Mathematics, Double-Free Set` `Eric Weisstein's World of Mathematics, Sum-Free Set` `Reinhard Zumkeller, Illustration of initial terms`
	CROSSREFS	`Sequence in context: A010061 A063186 A069061 this_sequence A007977 A013122 A012964` `Adjacent sequences: A088808 A088809 A088810 this_sequence A088812 A088813 A088814`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 19 2003`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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