id:A025582 - OEIS Search Results

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A B_2 sequence: a(n) = least value such that sequence increases and pairwise sums of elements are all distinct.

+0
12

0, 1, 3, 7, 12, 20, 30, 44, 65, 80, 96, 122, 147, 181, 203, 251, 289, 360, 400, 474, 564, 592, 661, 774, 821, 915, 969, 1015, 1158, 1311, 1394, 1522, 1571, 1820, 1895, 2028, 2253, 2378, 2509, 2779, 2924, 3154, 3353, 3590, 3796, 3997, 4296, 4432, 4778, 4850 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Index entries for B_2 sequences.`
	EXAMPLE	`After 0, 1, a(3) cannot be 2 because 2+0 = 1+1, so a(3) = 3.`
	CROSSREFS	`See A011185 for more information.` `A010672 is a similar sequence, but there the pairwise sums of distinct elements are all distinct.` `Sequence in context: A132273 A130050 A002049 this_sequence A029452 A034434 A167491` `Adjacent sequences: A025579 A025580 A025581 this_sequence A025583 A025584 A025585`
	KEYWORD	`nonn`
	AUTHOR	`Dan Hoey (Hoey(AT)AIC.NRL.Navy.Mil)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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