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 A100541 Triangle of 2-color Rado numbers R(k,n), n >= 4, 1 <= k <= n-3, for the equation x + y + k = n*z, writing -1 instead of infinity. 0
 -1, 12, 19, -1, 14, -1, 28, 27, 23, 33, -1, 35, -1, 26, -1, 45, 44, 44, 43, 29, 51, -1, 54, -1, 53, -1, 32, -1, 66, 65, 65, 64, 64, 63, 46, 73, -1, 77, -1, 76, -1, 75, -1, 50, -1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 4,2 REFERENCES S. Jones and D. Schaal, Two-color Rado numbers for x + y + z = kz, Discr. Math., 289 (2004), 63-69. LINKS EXAMPLE Triangle begins: -1 12 19 -1 14 -1 28 27 23 33 -1 35 -1 26 -1 45 44 44 43 29 51 ... CROSSREFS Sequence in context: A110932 A112880 A211083 * A056688 A107911 A143800 Adjacent sequences:  A100538 A100539 A100540 * A100542 A100543 A100544 KEYWORD sign,tabl AUTHOR N. J. A. Sloane, Dec 31 2004 STATUS approved

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