n in base 8 is a palindromic square.

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =36a(5) =81a(6) =121a(7) =729a(8) =4225a(9) =5329a(10) =6241a(11) =6561a(12) =6889a(13) =38025a(14) =47961a(15) =56169a(16) =133956a(17) =263169a(18) =294849a(19) =342225a(20) =485809a(21) =1196836a(22) =2368521a(23) =3080025a(24) =3515625a(25) =8468100a(26) =16785409a(27) =17313921a(28) =17850625a(29) =20043529