A squarefree ternary sequence.

Terms

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