Powers of 2 written in base 8.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =20a(5) =40a(6) =100a(7) =200a(8) =400a(9) =1000a(10) =2000a(11) =4000a(12) =10000a(13) =20000a(14) =40000a(15) =100000a(16) =200000a(17) =400000a(18) =1000000a(19) =2000000a(20) =4000000a(21) =10000000a(22) =20000000a(23) =40000000a(24) =100000000a(25) =200000000a(26) =400000000a(27) =1000000000a(28) =2000000000a(29) =4000000000