A234689 Number of (n+1) X (7+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant-stress 1 X 1 tilings).

3196416, 5385236, 9134920, 19258400, 40731576, 104366624, 265716040, 789826592, 2311358136, 7703580416, 25101251080

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=1:
  0 0 4 5 6 0 5 5      0 6 4 1 4 1 5 1      0 1 0 1 0 5 2 6
  0 5 4 0 6 5 5 0      0 1 4 6 4 6 5 6      0 6 0 6 0 0 2 1

Crossrefs

Column 7 of A234690.

Sequence in context: A034638 A122034 A153750 * A232619 A223287 A223484

Adjacent sequences: A234686 A234687 A234688 * A234690 A234691 A234692

Keyword

nonn

Author

R. H. Hardin, Dec 29 2013

Status

approved