|
Search: id:A163559
|
|
|
| A163559 |
|
Composite numbers such that exactly seven distinct permutations of digits give primes. |
|
+0
1
|
|
| 1037, 1073, 1190, 1247, 1274, 1345, 1354, 1370, 1379, 1397, 1435, 1472, 1495, 1534, 1594, 1679, 1703, 1724, 1730, 1739, 1742, 1769, 1793, 1796, 1910, 1937, 1945, 1954, 1967, 1976, 2093, 2147, 2174, 2374, 2390, 2471, 2597, 2714, 2734, 2743, 2759, 2795
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
MAPLE
|
a(1) = 1037 because 1037 is composite and 137, 173, 317, 1307, 3701, 7013, and 7103 are prime permutations, and no other permutation of 1036 is prime.
|
|
CROSSREFS
|
Sequence in context: A025412 A025409 A043388 this_sequence A159052 A065572 A074673
Adjacent sequences: A163556 A163557 A163558 this_sequence A163560 A163561 A163562
|
|
KEYWORD
|
easy,nonn,base
|
|
AUTHOR
|
Gil Broussard (gilbroussard(AT)bellsouth.net), Jul 30 2009
|
|
|
Search completed in 0.002 seconds
|
