|
| |
|
|
A023328
|
|
Numbers n such that n remains prime through 4 iterations of function f(x) = 10x + 3.
|
|
0
| |
|
|
2, 10061, 11777, 17489, 17839, 19379, 19441, 20071, 21773, 30809, 32069, 36529, 39511, 40973, 45503, 52223, 66943, 83813, 100613, 112213, 120067, 135089, 144427, 151573, 156887, 161093, 164999, 179111, 179497, 185923, 200713, 219943, 227489
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| n, 10*n+3, 100*n+33, 1000*n+333 and 10000+3333 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
PROG
| (MAGMA) [n: n in [1..5000000] | IsPrime(n) and IsPrime(10*n+3) and IsPrime(100*n+33) and IsPrime(1000*n+333) and IsPrime(10000*n+3333)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
CROSSREFS
| Sequence in context: A167748 A203755 A086563 * A134656 A128122 A082178
Adjacent sequences: A023325 A023326 A023327 * A023329 A023330 A023331
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
|
| |
|
|
