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A002853
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Maximal size of a set of equiangular lines in n dimensions.
(Formerly M2514 N0994)
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0
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1, 3, 6, 6, 10, 16, 28, 28, 28, 28, 28, 28, 28, 28, 36, 40, 48, 48
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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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.
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).
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CROSSREFS
| Sequence in context: A159787 A184161 A147849 * A184137 A135610 A157018
Adjacent sequences: A002850 A002851 A002852 * A002854 A002855 A002856
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KEYWORD
| hard,nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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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.
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