id:A093868 - OEIS Search Results

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Smallest prime that differs from a multiple of n by unity.

+0
4

2, 3, 2, 3, 11, 5, 13, 7, 17, 11, 23, 11, 53, 13, 29, 17, 67, 17, 37, 19, 41, 23, 47, 23, 101, 53, 53, 29, 59, 29, 61, 31, 67, 67, 71, 37, 73, 37, 79, 41, 83, 41, 173, 43, 89, 47, 281, 47, 97, 101, 101, 53, 107, 53, 109, 113, 113, 59, 353, 59, 367, 61, 127, 127, 131, 67, 269 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Numbers n such that a(n-1)=a(n+1)=n are A025584 (primes p such that p-2 is not a prime). - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 23 2004`
	FORMULA	`a(n) = min(A034694(n), A038700(n)) for all n >= 1. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 23 2004`
	CROSSREFS	`Cf. A093869.` `Cf. A034694 (Smallest prime == 1 (mod n)), A038700 (Smallest prime == -1 (mod n)).` `Sequence in context: A102310 A117936 A078331 this_sequence A077942 A077989 A109620` `Adjacent sequences: A093865 A093866 A093867 this_sequence A093869 A093870 A093871`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 20 2004`
	EXTENSIONS	`More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 23 2004`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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