a(n) = (tau(n^3)+2)/3.

Terms

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