id:A090937 - OEIS Search Results

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Beginning with 1, relatively prime numbers with least successive difference n. a(1) =1, (a(n),a(n-1))=1, a(n)-a(n-1) >= n.

+0
1

1, 2, 5, 9, 14, 23, 30, 41, 50, 61, 72, 85, 98, 113, 128, 145, 162, 181, 200, 221, 242, 265, 288, 313, 338 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(2n-1) = 2n^2, a(2n) = 2n^2 + 2n +1, for n > 4.`
	CROSSREFS	`Sequence in context: A011905 A098065 A123690 this_sequence A071609 A068501 A048071` `Adjacent sequences: A090934 A090935 A090936 this_sequence A090938 A090939 A090940`
	KEYWORD	`easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 29 2003`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.