A027627 Maximal cardinality of 2-distance set in R^n.

3, 5, 6, 10, 16, 27, 29, 45

Offset

1,1

References

E. Bannai and E. Bannai, Algebraic Combinatorics on Spheres [ in Japanese ], Springer-Verlag, Tokyo, 1999, p. 261.

Links

Table of n, a(n) for n=1..8.

Eiichi Bannai, Takahiro Sato, and Junichi Shigezumi, Maximal m-distance sets containing the representation of the Johnson graph J(n,m), Discrete Math. 312 (2012), no. 22, 3283--3292. MR2961217. - From N. J. A. Sloane, Sep 25 2012

Hong-Jun Ge, Jack Koolen, and Akihiro Munemasa, A 2-distance set with 277 points in the Euclidean space of dimension 23, arXiv:2504.18110 [math.CO], 2025.

Petr Lisonek, New maximal two-distance sets, J. Combin. Theory, A 77 (1997), 318-338.

Crossrefs

Sequence in context: A176747 A238488 A230124 * A194466 A270416 A290269

Adjacent sequences: A027624 A027625 A027626 * A027628 A027629 A027630

Keyword

nonn,hard,nice,more

Author

N. J. A. Sloane

Status

approved