Palindromic numbers in bases 7 and 9 written in base 10.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =8a(8) =40a(9) =50a(10) =100a(11) =164a(12) =200a(13) =264a(14) =300a(15) =328a(16) =400a(17) =2000a(18) =3550a(19) =8200a(20) =10252a(21) =14510a(22) =14762a(23) =22800a(24) =45600a(25) =164900a(26) =201720a(27) =400200a(28) =532900a(29) =555013