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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

LINKS

Table of n, a(n) for n=4..48.

S. Jones and D. Schaal, Two-color Rado numbers for x + y + z = kz, Discr. Math., 289 (2004), 63-69.

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 * A337424 A056688 A342071

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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Last modified October 19 03:10 EDT 2021. Contains 348073 sequences. (Running on oeis4.)