id:A075339 - OEIS Search Results

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a(1) = 1, a(2n) = smallest composite number obtained by adding a prime to a(2n-1). a(2n+1) = the smallest prime obtained by adding a composite number to a(2n).

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1, 4, 13, 15, 19, 21, 29, 32, 41, 44, 53, 55, 59, 62, 71, 74, 83, 85, 89, 91, 97, 99, 103, 105, 109, 111, 127, 129, 137, 140, 149, 152, 167, 169, 173, 175, 179, 182, 191, 194, 227, 230, 239, 242, 251, 253, 257, 259, 263, 265, 269, 272, 281, 284, 293, 295, 307 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(k) = b(k-1) for k > 6 where b(r) is the r-th term of A075338.`
	CROSSREFS	`Cf. A075338.` `Sequence in context: A066825 A014563 A066774 this_sequence A089733 A126908 A106681` `Adjacent sequences: A075336 A075337 A075338 this_sequence A075340 A075341 A075342`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 18 2002`
	EXTENSIONS	`More terms from David Wasserman (dwasserm(AT)earthlink.net), Jan 16 2005`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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