A071610 Integer radii of the spheres around (0,0,0) that contain record numbers of lattice points.

1, 2, 3, 3, 4, 6, 7, 9, 10, 11, 13, 14, 17, 18, 19, 22, 25, 26, 27, 29, 30, 31, 34, 34, 34, 36, 37, 41, 43, 44, 47, 52, 55, 56, 59, 59, 60, 66, 66, 70, 74, 75, 80, 86, 89, 90, 91, 94, 100, 103, 104, 109, 115, 115, 119, 125, 134, 141, 146, 153, 153, 157, 168, 171

Offset: 1

Author

Hugo Pfoertner, May 25 2002

Keywords

• nonn

Comments

Multiple entries indicate that there is more than one covered sphere with an increase in the number of hit lattice points within a radius difference of 1.

Crossrefs

Cf. A071342, A071343, A071344, A071609, A071611.

Formula

a(n) = ceiling(A071609(n)^(1/2)).