Write decimal digits for n, count endpoints (version 4).

Terms

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