id:A140181 - OEIS Search Results

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A number n is included if the smallest prime that is congruent to 1 (mod n) is >= the smallest prime that is congruent to -1 (mod n).

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1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 15, 17, 18, 19, 20, 21, 24, 27, 30, 31, 32, 34, 37, 38, 42, 44, 45, 47, 48, 49, 51, 54, 55, 57, 59, 60, 62, 64, 68, 69, 71, 72, 74, 75, 76, 77, 79, 80, 84, 85, 87, 90, 91, 94, 97, 98, 99, 102, 103, 104, 107, 108, 109, 110, 114, 115, 117 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Diana Mecum, Table of n, a(n) for n = 1..725`
	EXAMPLE	`For n = 1 and 2 the smallest prime that is congruent to 1 (mod n) equals the smallest prime that is congruent to -1 (mod n). For all other n the inequality is strict.`
	CROSSREFS	`Cf. A093868, A140180.` `Sequence in context: A004742 A100290 A050271 this_sequence A038032 A010408 A010455` `Adjacent sequences: A140178 A140179 A140180 this_sequence A140182 A140183 A140184`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), May 11 2008`
	EXTENSIONS	`More terms from Diana Mecum (diana.mecum(AT)gmail.com), Jul 04 2007`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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