|
| |
|
|
A023333
|
|
Numbers n such that n remains prime through 5 iterations of function f(x) = 2x + 7.
|
|
0
| |
|
|
14723, 20123, 54713, 109433, 594653, 604883, 676493, 759953, 847103, 935843, 1035743, 1049603, 1079033, 1099823, 1222253, 1263323, 1499153, 1754033, 1835003, 1893173, 2017283, 2071493, 2099213, 2199653, 2895743, 2998313, 3389693, 4133663
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| n, 2*n+7, 4*n+21, 8*n+49, 16*n+105 and 32*n+217 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
PROG
| (MAGMA) [n: n in [1..5000000] | IsPrime(n) and IsPrime(2*n+7) and IsPrime(4*n+21) and IsPrime(8*n+49) and IsPrime(16*n+105) and IsPrime(32*n+217)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
CROSSREFS
| Sequence in context: A186080 A013861 A015312 * A178587 A178588 A089315
Adjacent sequences: A023330 A023331 A023332 * A023334 A023335 A023336
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
|
| |
|
|
