|
| |
|
|
A217085
|
|
Numbers n such that (n^73-1)/(n-1) is prime.
|
|
6
|
|
|
|
11, 15, 75, 114, 195, 215, 295, 335, 378, 559, 566, 650, 660, 832, 871, 904, 966, 1021, 1112, 1203, 1334, 1433, 1485, 1724, 1822, 1959, 1998, 2115, 2154, 2432, 2465, 2486, 2544, 2559, 2564, 2575, 2611, 2681, 2705, 2735, 2754, 2806, 2880, 3158, 3222, 3306, 3368
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
G. C. Greubel, Table of n, a(n) for n = 1..5000 (terms 1..500 from Vincenzo Librandi)
|
|
|
MATHEMATICA
|
Select[Range[2, 1000], PrimeQ[(#^73 - 1)/(# - 1)] &] (* T. D. Noe, Sep 26 2012 *)
|
|
|
PROG
|
(PARI) is(n)=isprime((n^73-1)/(n-1)) \\ Charles R Greathouse IV, Feb 17 2017
|
|
|
CROSSREFS
|
Cf. A002384, A049409, A100330, A162862, A217070-A217089.
Sequence in context: A068483 A241679 A219389 * A267123 A115779 A147339
Adjacent sequences: A217082 A217083 A217084 * A217086 A217087 A217088
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Tim Johannes Ohrtmann, Sep 26 2012
|
|
|
EXTENSIONS
|
More terms from T. D. Noe, Sep 26 2012
|
|
|
STATUS
|
approved
|
| |
|
|
