Palindromic in bases 10 and 27.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =11a(11) =22a(12) =252a(13) =616a(14) =757a(15) =838a(16) =919a(17) =10301a(18) =13031a(19) =15951a(20) =17871a(21) =65856a(22) =1197911a(23) =2287822a(24) =4385834a(25) =5475745a(26) =5549455a(27) =6278726a(28) =6639366a(29) =7368637