Concatenation of the 6 prime factors of composite a(n) is a palindrome.

Terms

a(0) =64a(1) =729a(2) =15625a(3) =99375a(4) =117649a(5) =272685a(6) =525819a(7) =570999a(8) =1040655a(9) =1058145a(10) =1113879a(11) =1229865a(12) =1608285a(13) =1742279a(14) =1771561a(15) =2006697a(16) =2040423a(17) =2262771a(18) =2371551a(19) =3101259a(20) =3398759a(21) =3599775a(22) =4835523a(23) =4963299a(24) =5039685a(25) =5495301