A183373 Number of nX6 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors.
1, 25, 64, 144, 625, 3969, 22801, 104329, 580644, 3763600, 23707161, 144480400, 910470276, 5844449601, 37337446441, 237578256400, 1520187895681, 9757501690000, 62593240504921, 401316721817881, 2575276886918596
Offset: 1
Keywords
Examples
Some solutions for 5X6 ..0..1..1..1..0..1....0..0..1..1..0..0....0..0..0..1..1..0....1..0..1..0..0..0 ..0..1..0..1..0..1....0..1..1..1..1..0....0..1..1..0..1..0....1..0..1..0..1..1 ..1..1..1..1..0..1....1..1..0..1..1..0....0..1..0..0..0..1....0..0..0..0..0..0 ..0..1..0..0..0..0....0..1..1..1..0..0....1..0..1..0..1..1....1..1..1..0..1..0 ..0..1..0..1..1..1....0..0..1..0..0..1....1..1..1..1..0..0....0..0..0..0..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..200
Comments