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A002495 Theta series of 27-dimensional unimodular lattice with root system A_1 with no parity vector of norm 3. 0
1, 0, 2, 2676, 101118 (list; graph; refs; listen; history; text; internal format)
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

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).

CROSSREFS

Sequence in context: A225221 A114067 A109119 * A242109 A078457 A128148

Adjacent sequences:  A002492 A002493 A002494 * A002496 A002497 A002498

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 20 10:36 EST 2018. Contains 297960 sequences.