Palindromic numbers in bases 2 and 9 written in base 10.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =7a(5) =127a(6) =255a(7) =273a(8) =455a(9) =6643a(10) =17057a(11) =19433a(12) =19929a(13) =42405a(14) =1245161a(15) =1405397a(16) =1786971a(17) =2122113a(18) =3519339a(19) =4210945a(20) =67472641a(21) =90352181a(22) =133638015a(23) =134978817a(24) =271114881a(25) =6080408749a(26) =11022828069a(27) =24523959661a(28) =25636651261a(29) =25726334461