Table[(1/16)[{1-(-1)^n}{(n+15)-(n-9)i^(n+1)}+8{1+(-1)^n}(3+i^n)],{n,1,20}]

{1, 2, 3, 4, 2, 2, 3, 4, 3, 2, 3, 4, 4, 2, 3, 4, 5, 2, 3, 4}