Base-7 palindromes that start with 4.

Terms

a(0) =4a(1) =32a(2) =200a(3) =207a(4) =214a(5) =221a(6) =228a(7) =235a(8) =242a(9) =1376a(10) =1432a(11) =1488a(12) =1544a(13) =1600a(14) =1656a(15) =1712a(16) =9608a(17) =9657a(18) =9706a(19) =9755a(20) =9804a(21) =9853a(22) =9902a(23) =9958a(24) =10007a(25) =10056a(26) =10105a(27) =10154a(28) =10203a(29) =10252