id:A071559 - OEIS Search Results

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Smallest k such that n^2+k^2 and n+k are simultaneously primes.

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1, 1, 2, 1, 2, 1, 10, 3, 4, 1, 6, 7, 10, 9, 2, 1, 2, 5, 10, 3, 10, 15, 8, 5, 4, 5, 2, 13, 30, 11, 6, 5, 8, 9, 2, 1, 30, 3, 34, 1, 20, 5, 10, 9, 2, 15, 20, 13, 4, 11, 16, 7, 20, 25, 4, 11, 2, 3, 14, 13, 10, 17, 38, 9, 2, 1, 22, 5, 10, 3, 26, 7, 28, 5, 4, 21, 12, 25, 4, 9, 20, 15, 18, 19, 12 (list; graph; listen)

	OFFSET	`1,3`
	PROGRAM	`(PARI) for(n=1, 100, s=1; while(isprime(s^2+n^2)*isprime(s+n)==0, s++); print1(s, ", "))`
	CROSSREFS	`Sequence in context: A124781 A124151 A110179 this_sequence A071560 A097749 A126906` `Adjacent sequences: A071556 A071557 A071558 this_sequence A071560 A071561 A071562`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 30 2002`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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