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: A225221 A114067 A109119 * A078457 A128148 A158348
Adjacent sequences: A002492 A002493 A002494 * A002496 A002497 A002498
nonn,more
N. J. A. Sloane.
approved
