A064637 converted to factorial base.

Terms

a(0) =220a(1) =221a(2) =1220a(3) =1221a(4) =2200a(5) =2201a(6) =2210a(7) =2211a(8) =10220a(9) =10221a(10) =11220a(11) =11221a(12) =12200a(13) =12201a(14) =12210a(15) =12211a(16) =22000a(17) =22001a(18) =22010a(19) =22011a(20) =22100a(21) =22101a(22) =22110a(23) =22111a(24) =22220a(25) =22221a(26) =23020a(27) =23021a(28) =33300a(29) =33301