id:A161897 - OEIS Search Results

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Prime numbers p for which k = (3^p - 3 * 3^((p + 1) / 2) - 6p + 6) / (3p^2 - 3p) is an integer

+0
5

11, 23, 47, 59, 83, 107, 167, 179, 227, 263, 347, 359, 383, 467, 479, 503, 563, 587, 719, 839, 863, 887, 983, 1019, 1187, 1283, 1307, 1319, 1367, 1439, 1487, 1523, 1619, 1823, 1907, 2027, 2039, 2063, 2099, 2207, 2447, 2459, 2579, 2819, 2879, 2903, 2963, 2999 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Superset of the inverse Sophie Germain primes (A005385): (p - 1) / 2 is almost always prime.`
	CROSSREFS	`Cf. A161896 A000040, A005385 A158034, A158035, A158036 A145918` `Sequence in context: A029468 A068231 A073024 this_sequence A145994 A139834 A100558` `Adjacent sequences: A161894 A161895 A161896 this_sequence A161898 A161899 A161900`
	KEYWORD	`easy,nonn`
	AUTHOR	`Reikku Kulon (reikku(AT)gmail.com), Jun 21 2009`

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

AT&T Labs Research