0,3
R. Bacher and B. B. Venkov, Reseaux entiers unimodulaires sans racine en dimension 27 et 28, in Reseaux euclidiens, designs spheriques et formes modulaires, pp. 212-267, Enseignement Math., Geneva, 2001.
Table of n, a(n) for n=0..4.
R. Bacher and B. B. Venkov, Reseaux entiers unimodulaires sans racine en dimension 27 et 28 (html, ps).
Sequence in context: A179866 A201242 A062585 * A179961 A160224 A129061
Adjacent sequences: A002487 A002488 A002489 * A002491 A002492 A002493
nonn,more
N. J. A. Sloane.
approved
