id:A023267 - OEIS Search Results

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Numbers n such that n remains prime through 2 iterations of function f(x) = 9x + 8.

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7, 11, 19, 61, 97, 107, 131, 181, 251, 271, 397, 401, 419, 467, 557, 601, 677, 727, 907, 929, 1129, 1297, 1439, 1481, 1609, 1699, 1747, 1901, 1931, 2027, 2029, 2099, 2221, 2267, 2357, 2377, 2557, 2617, 2879, 3001, 3019, 3121, 3259, 3371, 3407, 3457, 3527 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A055939 A154555 A162857 this_sequence A050562 A057190 A106674` `Adjacent sequences: A023264 A023265 A023266 this_sequence A023268 A023269 A023270`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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