Numbers b such that b+1, b^2+1, b^4+1, b^8+1 and b^16+1 are primes.

Terms

a(0) =1a(1) =2a(2) =337536a(3) =585106a(4) =602056a(5) =2071960a(6) =11861410a(7) =20706120a(8) =54020170a(9) =72696726a(10) =87584646a(11) =89445636a(12) =95895930a(13) =98583340a(14) =98595070a(15) =112204200a(16) =205739220a(17) =279448296a(18) =292582836a(19) =337969690a(20) =349672456a(21) =432972780a(22) =437874186a(23) =474186576a(24) =479631880a(25) =483333426a(26) =621777466a(27) =643697776