A111756 - OEIS

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A111756

Greatest common divisors of consecutive terms of A091780.

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; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`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: A162220 A118911 A190268 * A130821 A129756 A156724` `Adjacent sequences: A111753 A111754 A111755 * A111757 A111758 A111759`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Nov 21 2005`

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Last modified February 15 21:00 EST 2012. Contains 205852 sequences.