A076180 Indices of spheres mentioned in A071609.

1, 2, 5, 8, 13, 23, 35, 63, 76, 86, 123, 163, 226, 264, 287, 374, 514, 523, 576, 664, 715, 787, 924, 927, 963, 1074, 1137, 1364, 1487, 1576, 1786, 2176, 2475, 2614, 2837, 2877, 2925, 3536, 3576, 4025, 4487, 4638, 5215, 6026, 6527, 6726, 6774

Offset: 1

Author

Hugo Pfoertner, Nov 01 2002

Keywords

• nonn

Examples

			a(7)=35 because A000378(35)=A071609(7)=41
		

References

• J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, Table 4.3, p. 107.

Links

• Hugo Pfoertner, Spheres containing record numbers of lattice points of Z^3

Crossrefs

Cf. A000378, A005875, A071609.

Formula

a(n) = k for which A000378(k) = A071609(n)