a(n) = 60 written in base n.

Terms

a(1) =111100a(2) =2020a(3) =330a(4) =220a(5) =140a(6) =114a(7) =74a(8) =66a(9) =60a(10) =55a(11) =50a(12) =48a(13) =44a(14) =40