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A002853 Maximal size of a set of equiangular lines in n dimensions.
(Formerly M2514 N0994)
0
1, 3, 6, 6, 10, 16, 28, 28, 28, 28, 28, 28, 28, 28, 36, 40, 48, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

W. W. R. Ball and H. S. M. Coxeter,"Mathematical Recreations and Essays," 13th Ed. Dover, p. 307.

F. Buekenhout, ed., Handbook of Incidence Geometry, 1995, p. 884.

P. W. H. Lemmens and J. J. Seidel, Equiangular lines, J. Algebra, 24 (1973), 494-512.

G. McConnell, Some non-standard ways to generate SIC-POVMs in dimensions 2 and 3, arXiv preprint arXiv:1402.7330, 2014. See Abstract. - N. J. A. Sloane, Apr 09 2014

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..18.

CROSSREFS

Sequence in context: A159787 A184161 A147849 * A184137 A135610 A157018

Adjacent sequences:  A002850 A002851 A002852 * A002854 A002855 A002856

KEYWORD

hard,nonn,nice

AUTHOR

N. J. A. Sloane.

EXTENSIONS

The sequence continues: 72 <= a(19) <= 76, 90 <= a(20) <= 96, a(21) = 126, a(22) = 176, a(23) = ... = a(42) = 276, a(43) = 344.

STATUS

approved

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Last modified October 25 20:39 EDT 2014. Contains 248557 sequences.