id:A061673 - OEIS Search Results

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Even numbers n such that n+1 and n-1 are both composite.

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26, 34, 50, 56, 64, 76, 86, 92, 94, 116, 118, 120, 122, 124, 134, 142, 144, 146, 154, 160, 170, 176, 184, 186, 188, 202, 204, 206, 208, 214, 216, 218, 220, 236, 244, 246, 248, 254, 260, 266, 274, 286, 288, 290, 296, 298, 300, 302, 304, 320, 322, 324, 326 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	EXAMPLE	`a(3)=50 because 50-1=49 and 50+1=51, and both 49 and 51 are composite.`
	CROSSREFS	`Cf. A055670.` `A025583(n-1) - 1.` `Sequence in context: A119481 A100393 A133635 this_sequence A072571 A058763 A103079` `Adjacent sequences: A061670 A061671 A061672 this_sequence A061674 A061675 A061676`
	KEYWORD	`easy,nonn,nice`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net), Jun 16 2001`

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.

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