id:A129767 - OEIS Search Results

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Interleaved primes and semiprimes.

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2, 4, 3, 6, 5, 9, 7, 10, 11, 14, 13, 15, 17, 21, 19, 22, 23, 25, 29, 26, 31, 33, 37, 34, 41, 35, 43, 38, 47, 39, 53, 46, 59, 49, 61, 51, 67, 55, 71, 57, 73, 58, 79, 62, 83, 65, 89, 69, 97, 74, 101, 77, 103, 82, 107, 85, 109, 86, 113, 87, 127, 91, 131, 93, 137, 94, 139, 95, 149 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`For n = 0, 1, 2, 3, ... a(2n+1) = prime(n) = A000040(n). a(2n) = semiprime(n) = A001358(n).`
	CROSSREFS	`Cf. A000040, A001358.` `Sequence in context: A114792 A113324 A143691 this_sequence A119618 A113321 A082560` `Adjacent sequences: A129764 A129765 A129766 this_sequence A129768 A129769 A129770`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Jun 02 2007`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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