id:A047621 - OEIS Search Results

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Numbers that are congruent to {3, 5} mod 8.

+0
3

3, 5, 11, 13, 19, 21, 27, 29, 35, 37, 43, 45, 51, 53, 59, 61, 67, 69, 75, 77, 83, 85, 91, 93, 99, 101, 107, 109, 115, 117, 123, 125, 131, 133, 139, 141, 147, 149, 155, 157, 163, 165, 171, 173, 179, 181, 187, 189, 195, 197, 203, 205, 211, 213, 219, 221, 227, 229 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Odd numbers n such that x^2 == 2 (mod n) has no solution, i.e. those n for which Jacobi symbol J(2,n) = -1. - Antti Karttunen (His-Firstname.His-Surname(AT)iki.fi), Aug 27 2005` `Hence also odd numbers n such that 2^n is not a square mod n.`
	CROSSREFS	`Row 1 of A112070. Complement of A047522 relative to A005408. Primes in this sequence: A003629.` `Cf. A066507.` `Sequence in context: A038951 A020578 A066587 this_sequence A117205 A136208 A045405` `Adjacent sequences: A047618 A047619 A047620 this_sequence A047622 A047623 A047624`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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

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