Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 114.
Table of n, a(n) for n=0..40.
Sequence in context: A220350 A171705 A228426 * A022070 A123301 A037933
Adjacent sequences: A023925 A023926 A023927 * A023929 A023930 A023931
N. J. A. Sloane.