id:A120374 - OEIS Search Results

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A120374

Median of prime divisors of 2n+1 (with multiplicity).

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3, 5, 7, 3, 11, 13, 4, 17, 19, 5, 23, 5, 3, 29, 31, 7, 6, 37, 8, 41, 43, 3, 47, 7, 10, 53, 8, 11, 59, 61, 3, 9, 67, 13, 71, 73, 5, 9, 79, 3, 83, 11, 16, 89, 10, 17, 12, 97, 3, 101, 103, 5, 107, 109, 20, 113, 14, 3, 12, 11, 22, 5, 127, 23, 131, 13, 3, 137, 139, 25, 12, 17, 7, 149, 151 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`165 = 3511, an odd number of prime divisors; the middle one is 5, so a(165) = 5. 315 = 335*7, an even number of prime divisors; the middle two are 3 and 5; their mean is 4, so a(315) = 4.`
	CROSSREFS	`Cf. A088836 (first difference at 2n+1 = 45).` `Sequence in context: A130140 A051417 A090368 this_sequence A088836 A076565 A100029` `Adjacent sequences: A120371 A120372 A120373 this_sequence A120375 A120376 A120377`
	KEYWORD	`nonn`
	AUTHOR	`Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 27 2006`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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