A002268 Dimensions of integral lattices that are irreducible modulo every prime (there may be missing terms!).

1, 8, 24, 248

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