Cubes that becomes a prime number when prefixed with a 4.

Terms

a(0) =1a(1) =729a(2) =2197a(3) =9261a(4) =29791a(5) =250047a(6) =389017a(7) =531441a(8) =658503a(9) =912673a(10) =1367631a(11) =1860867a(12) =2685619a(13) =5000211a(14) =5545233a(15) =7189057a(16) =8120601a(17) =15069223a(18) =19034163a(19) =20346417a(20) =21253933a(21) =24137569a(22) =29503629