|
| |
|
|
A023289
|
|
Numbers n such that n remains prime through 3 iterations of function f(x) = 6x + 7.
|
|
0
| |
|
|
5, 37, 127, 347, 977, 2017, 3607, 5477, 9137, 10487, 13687, 14057, 14107, 19037, 19697, 19727, 20507, 22157, 23887, 24097, 25237, 25307, 26717, 26777, 27107, 29347, 30697, 33757, 33997, 34667, 34847, 35117, 35227, 37057, 40577, 40627, 41177, 41597
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| n, 6*n+7, 36*n+49 and 216*n+301 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
PROG
| (MAGMA) [n: n in [1..150000] | IsPrime(n) and IsPrime(6*n+7) and IsPrime(36*n+49) and IsPrime(216*n+301)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
|
|
|
CROSSREFS
| Sequence in context: A142036 A089195 A201119 * A006468 A144954 A146195
Adjacent sequences: A023286 A023287 A023288 * A023290 A023291 A023292
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
|
| |
|
|
