A007890 expanded into single digits.

Terms

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