A234737 Number of (n+1) X (7+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 8 (constant-stress 1 X 1 tilings).

426120, 760608, 1283880, 2723040, 5395128, 13083552, 29705640, 79520352, 200901240, 578901408, 1586287080, 4838786400, 14115215928

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=1:
  2 6 1 7 0 5 3 5     0 5 1 5 2 7 0 5     6 1 7 1 7 0 6 3
  6 2 5 3 4 1 7 1     4 1 5 1 6 3 4 1     2 5 3 5 3 4 2 7

Crossrefs

Column 7 of A234738.

Sequence in context: A233499 A282337 A192228 * A206082 A209794 A234448

Adjacent sequences: A234734 A234735 A234736 * A234738 A234739 A234740

Keyword

nonn

Author

R. H. Hardin, Dec 30 2013

Status

approved