id:A105746 - OEIS Search Results

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a(n) = minimal c>0 such that (n+1)^2+4*n*c = d^2 is a square.

+0
12

3, 2, 4, 6, 8, 3, 12, 14, 16, 6, 20, 4, 24, 9, 7, 30, 32, 12, 36, 5, 8, 15, 44, 11, 48, 18, 52, 9, 56, 6, 60, 62, 15, 24, 20, 10, 72, 27, 16, 21, 80, 7, 84, 14, 11, 33, 92, 20, 96, 36, 23, 15, 104, 39, 12, 8, 24, 42, 116, 19, 120, 45, 39, 126, 35, 13, 132, 20, 31, 17, 140, 9, 144, 54 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`There is a family of solutions c = 2n - 2, d = 3n-1, which gives maximums at graphic of function c(n).`
	CROSSREFS	`Cf. A105734 - A105745.` `Sequence in context: A014685 A021312 A099258 this_sequence A166309 A114651 A138245` `Adjacent sequences: A105743 A105744 A105745 this_sequence A105747 A105748 A105749`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Apr 19 2005`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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