|
| |
|
|
A069176
|
|
Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8x+1 are all prime.
|
|
0
| |
|
|
253680, 1138830, 58680930, 90895770, 124253010, 269877300, 392071680, 613813200, 1014342210, 1277981670, 1413015030, 1453978680, 1753585680, 2919331380, 3424037190, 3538972710, 4025789040, 4175762010, 4362439200
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| For one such number, 41887255410, even 16X-1 and 16X+1 are primes.
|
|
|
EXAMPLE
| 253680 is there because 253679, 253681, 507359, 507361, 1014719, 1014721, 2029439 and 2029441 are all prime.
|
|
|
CROSSREFS
| Sequence in context: A113567 A083628 A140967 * A140079 A034631 A168352
Adjacent sequences: A069173 A069174 A069175 * A069177 A069178 A069179
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Don Reble (djr(AT)nk.ca), Apr 09 2002
|
| |
|
|
