Divisors of 400.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =10a(6) =16a(7) =20a(8) =25a(9) =40a(10) =50a(11) =80a(12) =100a(13) =200a(14) =400