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A071351
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2+n^4 and -2+n^4 are both prime numbers.
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1
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3, 21, 87, 99, 129, 141, 279, 627, 657, 777, 783, 795, 1653, 1725, 1833, 1959, 2001, 2043, 3039, 3399, 3609, 3861, 3975, 4257, 4371, 4491, 5403, 5541, 5709, 5985, 7371, 7539, 7869, 7917, 8397, 8445, 8547, 8793, 9051, 9057, 9915, 9933, 11067, 12153
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| n=3: n^4=81 and {79,83} are primes.
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MATHEMATICA
| lst={}; Do[p1=n^4-2; p2=n^4+2; If[PrimeQ[p1]&&PrimeQ[p2], AppendTo[lst, n]], {n, 0, 8!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 17 2009]
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CROSSREFS
| Cf. A028870, A038599, A154831, A154832, A154833, A154834, A154933, A154934, A154935, A154936 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 17 2009]
Sequence in context: A102832 A112851 A034490 * A083231 A129755 A059826
Adjacent sequences: A071348 A071349 A071350 * A071352 A071353 A071354
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KEYWORD
| easy,nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), May 21 2002
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