id:A088071 - OEIS Search Results

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Number sandwiched between two numbers having only one prime divisor.

+0
3

3, 4, 6, 8, 10, 12, 18, 24, 26, 28, 30, 42, 48, 60, 72, 80, 82, 102, 108, 126, 138, 150, 168, 180, 192, 198, 228, 240, 242, 270, 282, 312, 348, 360, 420, 432, 462, 522, 570, 600, 618, 642, 660, 728, 810, 822, 828, 840, 858, 882, 1020, 1032, 1050, 1062, 1092, 1152 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A014574 (average of twin prime pairs) is a subsequence.`
	PROGRAM	`(PARI) for(n=2, 1200, if(matsize(factor(n-1))[1]*matsize(factor(n+1))[1]==1, print1(n, ", ")))`
	CROSSREFS	`Cf. A014574, A088072.` `Sequence in context: A054041 A092137 A059608 this_sequence A024182 A064269 A120150` `Adjacent sequences: A088068 A088069 A088070 this_sequence A088072 A088073 A088074`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 22 2003`
	EXTENSIONS	`Edited and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 25 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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