A036716 a(n)=number of Gaussian integers z=a+bi satisfying n-1/2<|z|<=n+1/2, a>=0, 0<=b<=a.

1, 2, 2, 3, 5, 4, 6, 6, 7, 9, 8, 10, 9, 12, 12, 11, 15, 15, 15, 15, 15, 19, 18, 19, 19, 22, 21, 21, 24, 22, 26, 25, 24, 27, 29, 29, 29, 29, 32, 30, 34, 32, 34, 35, 34, 37, 35, 39, 39, 40, 40, 41, 44, 40, 43, 45, 43, 48, 43, 50, 48