Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8n+1 are all prime.
A069176
Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8n+1 are all prime.
Terms
- a(0) =253680a(1) =1138830a(2) =58680930a(3) =90895770a(4) =124253010a(5) =269877300a(6) =392071680a(7) =613813200a(8) =1014342210a(9) =1277981670a(10) =1413015030a(11) =1453978680a(12) =1753585680a(13) =2919331380a(14) =3424037190a(15) =3538972710a(16) =4025789040a(17) =4175762010a(18) =4362439200
External references
- oeis: A069176