Numbers that are palindromic in bases 2 and 7.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =85a(5) =107a(6) =257a(7) =5049a(8) =9201a(9) =11253a(10) =11757a(11) =210099a(12) =399171a(13) =512607a(14) =786435a(15) =12916899a(16) =19992857a(17) =22468309a(18) =1052109663a(19) =15935958711a(20) =24051338445a(21) =37344016593a(22) =71859215265a(23) =72822171105