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A002268 Dimensions of integral lattices that are irreducible modulo every prime (there may be missing terms!). 0
1, 8, 24, 248 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

R. Gow, Even unimodular lattices ... J. Alg. 22 (1989), 510-519.

R. Gow, Unimodular integral lattices ... Bull. Lond. Math. Soc. 21 (1989), 257-262.

B. H. Gross, Groups over Z, Invent Math. 124 (1996) 263-279.

J. G. Thompson, A simple subgroup of E_8(3), in Finite Groups Sympos., ed. N Iwahori, Japan Soc. Promotion Science, Tokyo, 1976, pp. 113-116.

J. G. Thompson, Finite groups and integral lattices, J. Alg 38 (1976) 523-524.

LINKS

Table of n, a(n) for n=1..4.

CROSSREFS

Sequence in context: A052656 A094061 A182589 * A050893 A037025 A105063

Adjacent sequences:  A002265 A002266 A002267 * A002269 A002270 A002271

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane and J. H. Conway

STATUS

approved

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Last modified January 22 15:57 EST 2019. Contains 319364 sequences. (Running on oeis4.)