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.

-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

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