id:A049990 - OEIS Search Results

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a(n)=number of arithmetic progressions of 2 or more positive integers, nondecreasing with sum n.

+0
1

0, 1, 2, 3, 3, 6, 4, 6, 8, 8, 6, 13, 7, 10, 15, 12, 9, 19, 10, 16, 20, 15, 12, 26, 16, 17, 25, 21, 15, 34, 16, 22, 30, 22, 24, 40, 19, 24, 35, 32, 21, 45, 22, 30, 47, 29, 24, 51, 28, 37, 46, 35, 27, 56, 36, 40, 51, 36, 30, 70, 31, 38, 61, 43 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`Sequence in context: A071915 A021432 A141729 this_sequence A062774 A045892 A160791` `Adjacent sequences: A049987 A049988 A049989 this_sequence A049991 A049992 A049993`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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