Numbers k such that 3^k + 3*k + 1 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =41a(4) =45a(5) =83a(6) =95a(7) =181a(8) =193a(9) =195a(10) =311a(11) =325a(12) =901a(13) =1825a(14) =3649a(15) =7709a(16) =16335a(17) =45547