Numbers k such that 1+k, 1+k^2, 1+k^4 and 1+k^16 are all prime.

Terms

a(0) =1a(1) =2a(2) =690a(3) =33190a(4) =57106a(5) =77140a(6) =135606a(7) =258990a(8) =303430a(9) =331140a(10) =337536a(11) =359230a(12) =375646a(13) =455526a(14) =458326a(15) =493396a(16) =548226a(17) =550540a(18) =585106a(19) =602056a(20) =659250a(21) =680830a(22) =742306a(23) =800406a(24) =827680a(25) =870240a(26) =918340a(27) =925390a(28) =968320a(29) =1203100