Divisors of 180.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =9a(7) =10a(8) =12a(9) =15a(10) =18a(11) =20a(12) =30a(13) =36a(14) =45a(15) =60a(16) =90a(17) =180