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Search: id:A059442
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| A059442 |
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Array of Ramsey numbers R(n,k) read by antidiagonals. |
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+0
2
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| 2, 3, 3, 4, 6, 4, 5, 9, 9, 5, 6, 14, 18, 14, 6, 7, 18, 25, 25, 18, 7, 8, 23
(list; table; graph; listen)
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OFFSET
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0,1
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 288.
J. G. Kalbfleisch, Construction of special edge-chromatic graphs, Canad. Math. Bull., 8 (1965), 575-584.
H. J. Ryser, Combinatorial Mathematics. Mathematical Association of America, Carus Mathematical Monograph 14, 1963, p. 42.
Jin Xu and C. K. Wong, Self-complementary graphs and Ramsey numbers I, Discrete Math., 223 (2000), 309-326.
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LINKS
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Stanislaw Radziszowski, Small Ramsey Numbers.
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EXAMPLE
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Array R(n,k), n >= 2, k >= 2, begins
2 3 4 5 6 7 ...
3 6 9 14 18 ...
4 9 18 25 ? ...
5 14 25 ? ...
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CROSSREFS
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Second row gives A000791.
Sequence in context: A023154 A070820 A031501 this_sequence A014410 A159999 A003977
Adjacent sequences: A059439 A059440 A059441 this_sequence A059443 A059444 A059445
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KEYWORD
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nonn,tabl,nice,hard
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Feb 01 2001
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EXTENSIONS
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Next entry is in range 35-41.
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