Numbers with exactly 4 distinct palindromic prime factors.

Terms

a(0) =210a(1) =330a(2) =462a(3) =770a(4) =1155a(5) =3030a(6) =3930a(7) =4242a(8) =4530a(9) =5430a(10) =5502a(11) =5730a(12) =6342a(13) =6666a(14) =7070a(15) =7602a(16) =8022a(17) =8646a(18) =9170a(19) =9390a(20) =9966a(21) =10570a(22) =10590a(23) =10605a(24) =11110a(25) =11190a(26) =11490a(27) =11946a(28) =12606a(29) =12670