A046110 Number of lattice points on circumference of a circle of radius (2n+1)/2 with center at (1/2,0).

2, 2, 6, 2, 2, 2, 6, 6, 6, 2, 2, 2, 10, 2, 6, 2, 2, 6, 6, 6, 6, 2, 6, 2, 2, 6, 6, 6, 2, 2, 6, 2, 18, 2, 2, 2, 6, 10, 2, 2, 2, 2, 18, 6, 6, 6, 2, 6, 6, 2, 6, 2, 6, 2, 6, 6, 6, 6, 6, 6, 2, 6, 14, 2, 2, 2, 2, 6, 6, 2, 2, 6, 18, 2, 6, 2, 6, 6, 6, 6, 2, 2, 6, 2, 10, 2, 6, 10, 2, 2, 6, 6, 18, 6, 2, 2, 6, 18

Offset: 0

Author

Eric W. Weisstein

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Circle Lattice Points.

Crossrefs

Cf. A046109.

Formula

a(n) = 4 * A046080(2*n+1) + 2. - Sean A. Irvine, Apr 02 2021