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A076180 Indices of spheres mentioned in A071609. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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

LINKS

Table of n, a(n) for n=1..47.

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

FORMULA

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

EXAMPLE

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

CROSSREFS

Cf. A000378, A005875, A071609.

Sequence in context: A015724 A290133 A089897 * A326506 A229898 A200275

Adjacent sequences:  A076177 A076178 A076179 * A076181 A076182 A076183

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Nov 01 2002

STATUS

approved

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Last modified October 20 10:00 EDT 2020. Contains 337900 sequences. (Running on oeis4.)