n written in base where place values are positive squares.

Terms

a(0) =1a(1) =2a(2) =3a(3) =10a(4) =11a(5) =12a(6) =13a(7) =20a(8) =100a(9) =101a(10) =102a(11) =103a(12) =110a(13) =111a(14) =112a(15) =1000a(16) =1001a(17) =1002a(18) =1003a(19) =1010a(20) =1011a(21) =1012a(22) =1013a(23) =1020a(24) =10000a(25) =10001a(26) =10002a(27) =10003a(28) =10010a(29) =10011