A234664 Number of (n+1) X (6+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).

2564388, 8659270, 29828832, 109044744, 406314140, 1591037136, 6340767776, 26370069748, 111476657864, 489100455892, 2179024286836

Offset

1,1

Links

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

Example

Some solutions for n=1:
  0 2 0 1 6 6 2        0 2 2 6 5 1 3        0 2 6 5 5 1 1
  3 1 3 0 1 5 5        0 6 2 2 5 5 3        0 6 6 1 5 5 1

Crossrefs

Column 6 of A234665.

Sequence in context: A096557 A345087 A345088 * A225321 A259563 A151938

Adjacent sequences: A234661 A234662 A234663 * A234665 A234666 A234667

Keyword

nonn

Author

R. H. Hardin, Dec 29 2013

Status

approved