Numbers k for which 2*k-1, 4*k-1, 8*k-1, 16*k-1, 32*k-1, 64*k-1 and 128*k-1 are primes.
A124514
Numbers k for which 2*k-1, 4*k-1, 8*k-1, 16*k-1, 32*k-1, 64*k-1 and 128*k-1 are primes.
Terms
- a(0) =561330a(1) =1082115a(2) =1164735a(3) =5128905a(4) =5154945a(5) =6157350a(6) =7015155a(7) =7072770a(8) =9549960a(9) =11551830a(10) =12088065a(11) =14421825a(12) =18544365a(13) =19099920a(14) =21194760a(15) =24580050a(16) =25392720a(17) =26277285a(18) =31400085a(19) =34359030a(20) =42932385a(21) =44087025a(22) =47915595
External references
- oeis: A124514