Numbers k such that k-1, k+1, k^2+1, k^4+1 and k^8+1 are all prime numbers.
A070157
Numbers k such that k-1, k+1, k^2+1, k^4+1 and k^8+1 are all prime numbers.
Terms
- a(0) =4a(1) =19380a(2) =9443670a(3) =11054760a(4) =15992070a(5) =22482330a(6) =32557380a(7) =51102510a(8) =57978840a(9) =60549240a(10) =64671570a(11) =84045960a(12) =89757960a(13) =111316170a(14) =112821690a(15) =116433510a(16) =171124380a(17) =171418650a(18) =183082350a(19) =196694760a(20) =197021160a(21) =241803240a(22) =266498460
External references
- oeis: A070157