A251242 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.
75, 14265, 20904689, 236035946835, 20534495636679387, 13764744150100667222985, 71093648993125363900542904561, 2829255370682961509218005180234886323
Offset: 1
Keywords
Examples
Some solutions for n=2 ..2..0..0....0..2..1....2..0..2....1..2..0....2..0..1....2..2..0....1..1..0 ..1..2..0....0..0..1....1..1..2....1..2..0....2..1..2....1..2..1....2..2..1 ..2..1..0....0..0..2....0..0..0....1..1..1....1..1..0....1..1..2....1..0..2
Links
- R. H. Hardin, Table of n, a(n) for n = 1..11
Comments