Write A003511(n) in the base {1, 3, 4, 11, 15, 41, 56, 153, 209, ...} (see A002530).

Terms

a(0) =1a(1) =2a(2) =100a(3) =101a(4) =102a(5) =200a(6) =201a(7) =202a(8) =1001a(9) =1002a(10) =10000a(11) =10001a(12) =10002a(13) =10100a(14) =10101a(15) =10102a(16) =10200a(17) =10201a(18) =10202a(19) =11001a(20) =11002a(21) =20000a(22) =20001a(23) =20002a(24) =20100a(25) =20101a(26) =20102a(27) =20200a(28) =20201a(29) =20202