|
Search: id:A071351
|
|
|
| A071351 |
|
2+n^4 and -2+n^4 are both prime numbers. |
|
+0
2
|
|
| 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; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
n=3: n^4=81 and {79,83} are primes.
|
|
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]
|
|
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 this_sequence A083231 A129755 A059826
Adjacent sequences: A071348 A071349 A071350 this_sequence A071352 A071353 A071354
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Labos E. (labos(AT)ana.sote.hu), May 21 2002
|
|
|
Search completed in 0.002 seconds
|
