a(n) = (tau(n^6)+5)/6.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =2a(5) =9a(6) =2a(7) =4a(8) =3a(9) =9a(10) =2a(11) =16a(12) =2a(13) =9a(14) =9a(15) =5a(16) =2a(17) =16a(18) =2a(19) =16a(20) =9a(21) =9a(22) =2a(23) =23a(24) =3a(25) =9a(26) =4a(27) =16a(28) =2a(29) =58