Cubes that becomes a prime number when prefixed with a 7.

Terms

a(0) =1a(1) =27a(2) =19683a(3) =29791a(4) =35937a(5) =50653a(6) =79507a(7) =132651a(8) =185193a(9) =226981a(10) =912673a(11) =2146689a(12) =2685619a(13) =3442951a(14) =3869893a(15) =4330747a(16) =5929741a(17) =8869743a(18) =10503459a(19) =19902511a(20) =28934443a(21) =33076161a(22) =36926037a(23) =38958219a(24) =42508549a(25) =47045881a(26) =49430863