Divisors of 680.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =10a(6) =17a(7) =20a(8) =34a(9) =40a(10) =68a(11) =85a(12) =136a(13) =170a(14) =340a(15) =680