Cubes that becomes a prime number when prefixed with a 6.

Terms

a(0) =1a(1) =343a(2) =1331a(3) =117649a(4) =389017a(5) =571787a(6) =704969a(7) =1442897a(8) =1685159a(9) =2352637a(10) =2685619a(11) =4826809a(12) =5929741a(13) =6539203a(14) =6967871a(15) =9393931a(16) =15069223a(17) =15813251a(18) =16194277a(19) =22665187a(20) =25153757a(21) =35611289a(22) =49430863a(23) =58863869a(24) =59776471a(25) =62570773