id:A078332 - OEIS Search Results

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First prime such that p^2 == -1 (mod n), or 0 if no such prime exists.

+0
1

2, 3, 0, 0, 2, 0, 0, 0, 0, 3, 0, 0, 5, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 7, 5, 0, 0, 17, 0, 0, 0, 0, 13, 0, 0, 31, 0, 0, 0, 73, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 23, 0, 0, 0, 0, 17, 0, 0, 11, 0, 0, 0, 47, 0, 0, 0, 0, 0, 0, 0, 173, 31, 0, 0, 0, 0, 0, 0, 0, 73, 0, 0, 13, 0, 0, 0, 233, 0, 0, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=3 as 3^2 == -1 (mod 2).`
	PROGRAM	`(PARI) for (n=1, 100, f=true; forprime(p=2, 1000, if (p^2%n==(n-1), print1(p", "); f=false; break)); if (f==true, print1(0", ")))`
	CROSSREFS	`Sequence in context: A024466 A021817 A069585 this_sequence A097109 A011023 A097027` `Adjacent sequences: A078329 A078330 A078331 this_sequence A078333 A078334 A078335`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Nov 21 2002`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

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