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

0,1

Links

Table of n, a(n) for n=0..97.

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

Formula

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

Crossrefs

Cf. A046109.

Sequence in context: A077894 A053214 A077198 * A296091 A352892 A126889

Adjacent sequences: A046107 A046108 A046109 * A046111 A046112 A046113

Keyword

nonn

Author

Eric W. Weisstein

Status

approved