id:A155141 - OEIS Search Results

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Primes p such that both p-+4 are Square-free.

+0
4

2, 3, 7, 11, 17, 19, 37, 43, 47, 61, 73, 83, 89, 97, 101, 107, 109, 127, 137, 163, 181, 191, 197, 199, 223, 227, 233, 251, 263, 269, 277, 281, 307, 313, 317, 331, 349, 353, 389, 397, 431, 433, 439, 443, 449, 457, 461, 467, 487, 523, 541, 547, 557, 569, 577, 587 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	<<NumberTheory`NumberTheoryFunctions` lst={}; Do[p=Prime[n]; If[SquareFreeQ[p-4]&&SquareFreeQ[p+4], AppendTo[lst, p]], {n, 6!}]; lst
	CROSSREFS	`Cf. A153213, A049282, A155139, A155140` `Sequence in context: A040103 A045323 A161185 this_sequence A127944 A045324 A140460` `Adjacent sequences: A155138 A155139 A155140 this_sequence A155142 A155143 A155144`
	KEYWORD	`nonn`
	AUTHOR	`Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 21 2009`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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