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 A059442 Array of Ramsey numbers R(n,k) read by antidiagonals. 3
 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; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 288. H. J. Ryser, Combinatorial Mathematics, Chapter 4 - A Theorem of Ramsey, Mathematical Association of America, Carus Mathematical Monograph 14, 1963, p. 42. LINKS J. G. Kalbfleisch, Construction of special edge-chromatic graphs, Canad. Math. Bull., 8 (1965), 575-584. Stanislaw Radziszowski, Small Ramsey Numbers, The Electronic Journal of Combinatorics, Dynamic Surveys, DS1, Mar 3 2017. Eric Weisstein's World of Mathematics, Ramsey Number Wikipedia, Ramsey's theorem Jin Xu and C. K. Wong, Self-complementary graphs and Ramsey numbers I, Discrete Math., 223 (2000), 309-326. EXAMPLE Array R(n,k), n >= 2, k >= 2, begins:    2,  3,  4,  5,  6,  7,  8,  9, 10,    3,  6,  9, 14, 18, 23, 28, 36,    4,  9, 18, 25,  ?,  ?,  ?,    5, 14, 25,  ?,  ?,  ?,    6, 18,  ?,  ?,  ?,    7, 23,  ?,  ?,    8, 28,  ?,    9, 36,   10, CROSSREFS Second row gives A000791. Sequence in context: A031501 A279417 A203996 * A225273 A014410 A180986 Adjacent sequences:  A059439 A059440 A059441 * A059443 A059444 A059445 KEYWORD nonn,tabl,nice,hard AUTHOR N. J. A. Sloane, Feb 01 2001 EXTENSIONS Next entry is in range 35-41. More terms in example section (antidiagonals 6-10. Cf. A000791) from Omar E. Pol, Jun 11 2012 STATUS approved

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Last modified August 14 17:54 EDT 2022. Contains 356122 sequences. (Running on oeis4.)