id:A075593 - OEIS Search Results

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a(1) = 1, a(2n) = prime, a(2n+1) = composite and sum of two successive terms is alternately composite or prime.

+0
6

1, 3, 4, 2, 9, 5, 6, 19, 10, 11, 8, 7, 12, 13, 16, 17, 14, 31, 22, 23, 18, 37, 24, 41, 20, 29, 30, 47, 26, 43, 28, 53, 36, 59, 38, 61, 40, 71, 32, 67, 34, 83, 44, 73, 54, 79, 48, 97, 42, 101, 50, 103, 46, 89, 60, 109, 58, 107, 56, 113, 66, 137, 62, 127, 52, 131, 68, 139, 72 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`This is not a permutation of the positive integers; odd composites > 9 will not appear in the sequence. - Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Feb 06 2006`
	CROSSREFS	`Cf. A075594, A103824, A103825.` `Adjacent sequences: A075590 A075591 A075592 this_sequence A075594 A075595 A075596` `Sequence in context: A082362 A082364 A091477 this_sequence A145421 A019474 A072565`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 27 2002`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net) Feb 16 2005`

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Last modified November 8 19:30 EST 2009. Contains 166227 sequences.

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