id:A016838 - OEIS Search Results

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(4n+3)^2.

+0
1

9, 49, 121, 225, 361, 529, 729, 961, 1225, 1521, 1849, 2209, 2601, 3025, 3481, 3969, 4489, 5041, 5625, 6241, 6889, 7569, 8281, 9025, 9801, 10609, 11449, 12321, 13225, 14161, 15129, 16129, 17161, 18225 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`If Y is a fixed 2-subset of a (4n+1)-set X then a(n-1) is the number of 3-subsets of X intersecting Y. - Milan R. Janjic (agnus(AT)blic.net), Oct 21 2007`
	LINKS	`Milan Janjic, Two Enumerative Functions`
	CROSSREFS	`Adjacent sequences: A016835 A016836 A016837 this_sequence A016839 A016840 A016841` `Sequence in context: A087352 A039940 A012111 this_sequence A087691 A014730 A020245`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

AT&T Labs Research