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A002490 Theta series of 27-dimensional unimodular lattice with root system A_1 and a parity vector of norm 3. +0
1
1, 0, 2, 1652, 119550 (list; graph; listen)
OFFSET

0,3

REFERENCES

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.

LINKS

R. Bacher and B. B. Venkov, Reseaux entiers unimodulaires sans racine en dimension 27 et 28 (html, ps).

CROSSREFS

Sequence in context: A058423 A110027 A062585 this_sequence A129061 A011541 A080642

Adjacent sequences: A002487 A002488 A002489 this_sequence A002491 A002492 A002493

KEYWORD

nonn,more

AUTHOR

njas

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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