id:A023276 - OEIS Search Results

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Numbers n such that n remains prime through 3 iterations of function f(x) = 2x + 9.

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5, 11, 31, 71, 281, 521, 911, 1181, 2371, 2521, 3391, 3701, 4211, 4931, 5051, 7211, 7411, 8221, 8431, 8461, 8501, 8641, 8951, 9601, 9871, 10301, 11981, 12421, 13121, 13921, 14591, 16381, 16451, 16901, 16931, 17791, 17881, 19391, 19751, 21991, 23021 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Adjacent sequences: A023273 A023274 A023275 this_sequence A023277 A023278 A023279` `Sequence in context: A038580 A106088 A077446 this_sequence A074648 A106908 A107442`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

AT&T Labs Research