|
Search: id:A163561
|
|
|
| A163561 |
|
Composite numbers such that exactly nine distinct permutations of digits give primes. |
|
+0
1
|
|
| 1094, 1349, 1394, 1457, 1475, 1490, 1547, 1574, 1745, 1754, 1904, 1934, 1940, 1943, 3097, 3149, 3194, 3419, 3479, 3497, 3679, 3749, 3790, 3794, 3796, 3914, 3941, 3970, 3974, 3976, 4109, 4175, 4190, 4193, 4319, 4379, 4571, 4715, 4739, 4901, 4910, 4913
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
MAPLE
|
a(1) = 1094 because 1094 is composite and 149, 419, 491, 941, 1049, 1409, 4019, 4091, and 9041 are prime permutations and no other permutation of 1094 is prime.
|
|
CROSSREFS
|
Sequence in context: A091674 A022197 A124122 this_sequence A160370 A123366 A096926
Adjacent sequences: A163558 A163559 A163560 this_sequence A163562 A163563 A163564
|
|
KEYWORD
|
easy,nonn,base
|
|
AUTHOR
|
Gil Broussard (gilbroussard(AT)bellsouth.net), Jul 30 2009
|
|
|
Search completed in 0.002 seconds
|
