Palindromes with exactly 4 distinct prime factors.

Terms

a(0) =858a(1) =2002a(2) =2442a(3) =3003a(4) =4774a(5) =5005a(6) =5115a(7) =6666a(8) =10101a(9) =15351a(10) =17871a(11) =22422a(12) =22722a(13) =24242a(14) =26562a(15) =26962a(16) =28482a(17) =35853a(18) =36363a(19) =41314a(20) =43734a(21) =43834a(22) =45654a(23) =47874a(24) =49494a(25) =49794a(26) =49894a(27) =51015a(28) =51315a(29) =51415