id:A111756 - OEIS Search Results

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Greatest common divisors of consecutive terms of A091780.

+0
1

3, 3, 3, 3, 5, 5, 5, 5, 5, 3, 7, 7, 7, 7, 5, 5, 9, 9, 3, 3, 11, 11, 11, 11, 5, 5, 13, 13, 13, 13, 3, 3, 17, 17, 17, 17, 5, 3, 19, 19, 19, 19, 5, 7, 7, 21, 3, 3, 23, 23, 23, 23, 5, 5, 3, 27, 3, 11, 7, 7, 13, 3, 29, 29, 29, 29, 5, 3, 31, 31, 31, 31, 5, 5, 3, 9, 3, 3, 37, 37, 37, 37, 5, 11, 11, 11 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`It appears that each prime p>2 first appears in this sequence in a run of length 4, except for prime(3)=5, which first occurs in a run of length 5. This has been confirmed through prime(135)=761.`
	EXAMPLE	`The fifth and sixth terms of A091780 are 15 and 10, respectively, so a(5)=5.`
	CROSSREFS	`Cf. A091780.` `Sequence in context: A125713 A162220 A118911 this_sequence A130821 A129756 A156724` `Adjacent sequences: A111753 A111754 A111755 this_sequence A111757 A111758 A111759`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Nov 21 2005`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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