3-smooth numbers in ternary representation.

Terms

a(0) =1a(1) =2a(2) =10a(3) =11a(4) =20a(5) =22a(6) =100a(7) =110a(8) =121a(9) =200a(10) =220a(11) =1000a(12) =1012a(13) =1100a(14) =1210a(15) =2000a(16) =2101a(17) =2200a(18) =10000a(19) =10120a(20) =11000a(21) =11202a(22) =12100a(23) =20000a(24) =21010a(25) =22000a(26) =100000a(27) =100111a(28) =101200a(29) =110000