Sums of distinct powers of 9.

Terms

a(0) =0a(1) =1a(2) =9a(3) =10a(4) =81a(5) =82a(6) =90a(7) =91a(8) =729a(9) =730a(10) =738a(11) =739a(12) =810a(13) =811a(14) =819a(15) =820a(16) =6561a(17) =6562a(18) =6570a(19) =6571a(20) =6642a(21) =6643a(22) =6651a(23) =6652a(24) =7290a(25) =7291a(26) =7299a(27) =7300a(28) =7371a(29) =7372