A265656 T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
1, 1, 1, 1, 2, 1, 1, 1, 7, 1, 1, 2, 20, 43, 1, 1, 1, 104, 1129, 372, 1, 1, 2, 476, 39913, 104241, 4027, 1, 1, 1, 2428, 1465545, 35213302, 14031233, 51871, 1, 1, 2, 12362, 56069313, 13162584704, 59232755329, 2641322440, 773186, 1, 1, 1, 64454, 2233380101
Offset: 1
Examples
Some solutions for n=4 k=4 ..0..1..1..2....0..1..2..0....0..1..2..3....0..1..2..1....0..0..1..1 ..2..3..0..2....3..1..2..0....2..3..0..0....3..3..2..0....2..3..2..2 ..2..1..1..3....3..0..3..3....0..1..2..2....2..0..1..0....1..0..0..3 ..3..0..0..3....1..2..1..2....3..1..3..1....1..3..2..3....3..3..1..2
Links
- R. H. Hardin, Table of n, a(n) for n = 1..60
Crossrefs
Column 2 is A265229.
Comments