Powers of 3 written in base 9.

Terms

a(0) =1a(1) =3a(2) =10a(3) =30a(4) =100a(5) =300a(6) =1000a(7) =3000a(8) =10000a(9) =30000a(10) =100000a(11) =300000a(12) =1000000a(13) =3000000a(14) =10000000a(15) =30000000a(16) =100000000a(17) =300000000a(18) =1000000000a(19) =3000000000a(20) =10000000000a(21) =30000000000a(22) =100000000000a(23) =300000000000a(24) =1000000000000