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A238839 List of Coxeter numbers of the 24 even unimodular lattices in dimension 24. 1
0, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 10, 12, 12, 13, 14, 16, 18, 18, 22, 25, 30, 30, 46 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

These lattices consist of the Leech lattice and the 23 Niemeier lattices.

LINKS

Table of n, a(n) for n=1..24.

J. H. Conway and N. J. A. Sloane, Sphere Packings, Lattices and Groups, 3rd. ed., 1993. Table 16.1, p. 407.

Hans-Volker Niemeier, Definite quadratische Formen der Dimension 24 und Diskriminante 1, J. Number Theory 5 (1973), 142--178. MR0316384 (47 #4931).

CROSSREFS

A239048 is a subsequence.

Sequence in context: A099848 A082287 A331267 * A269169 A248148 A210062

Adjacent sequences:  A238836 A238837 A238838 * A238840 A238841 A238842

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Mar 18 2014

STATUS

approved

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Last modified January 28 03:28 EST 2020. Contains 331314 sequences. (Running on oeis4.)