|
Search: id:A137705
|
|
|
| A137705 |
|
Prime numbers p such that p +- ((p-1)/4) are primes. |
|
+0
1
|
|
| 1489, 2377, 2689, 2857, 3361, 3889, 4969, 5569, 6481, 6577, 7537, 8089, 10009, 11257
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
1489+-(1488/4)=primes
2377+-(2376/4)=primes
|
|
MATHEMATICA
|
w=4; s=""; For[i=1, i<10^3*2, p=Prime[i]; If[PrimeQ[p-((p-1)/w)]&&PrimeQ[p+((p-1)/w)], (*Print[p, ":", p-((p-1)/w), ", ", p+((p-1)/w)]; *)s=s<>ToString[p]<>", "]; i++ ]; Print[s]
|
|
CROSSREFS
|
Sequence in context: A104742 A051260 A028515 this_sequence A067841 A062912 A098191
Adjacent sequences: A137702 A137703 A137704 this_sequence A137706 A137707 A137708
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 27 2008
|
|
|
Search completed in 0.002 seconds
|
