A squarefree ternary sequence.

Terms

a(0) =1a(1) =2a(2) =3a(3) =1a(4) =2a(5) =1a(6) =3a(7) =2a(8) =3a(9) =1a(10) =3a(11) =2a(12) =1a(13) =2a(14) =3a(15) =1a(16) =2a(17) =1a(18) =3a(19) =2a(20) =1a(21) =2a(22) =3a(23) =1a(24) =3a(25) =2a(26) =3a(27) =1a(28) =2a(29) =1