Fibonacci numbers written in base 4.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =11a(6) =20a(7) =31a(8) =111a(9) =202a(10) =313a(11) =1121a(12) =2100a(13) =3221a(14) =11321a(15) =21202a(16) =33123a(17) =120331a(18) =220120a(19) =1001111a(20) =1221231a(21) =2223002a(22) =10110233a(23) =12333301a(24) =23110200a(25) =102110101a(26) =131220301a(27) =233331002a(28) =1031211303a(29) =1331202311