id:A023301 - OEIS Search Results

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Numbers n such that n remains prime through 3 iterations of function f(x) = 10x + 9.

+0
2

13, 139, 293, 331, 547, 967, 1049, 1399, 1567, 1889, 1997, 2087, 2137, 2309, 2423, 2437, 2753, 2939, 3719, 3761, 3919, 4451, 4517, 4621, 6089, 7001, 7741, 8423, 8849, 9437, 10487, 11657, 12007, 12347, 12823, 13469, 15289, 15373, 15661, 17737, 17989 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A113579 A090505 A088096 this_sequence A023329 A142896 A125425` `Adjacent sequences: A023298 A023299 A023300 this_sequence A023302 A023303 A023304`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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