A234650 Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).

160, 2648, 28496, 274520, 2113072, 16899896, 118121744, 888784184, 6128843440

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Diagonal of A234658.

Sequence in context: A013446 A013444 A013448 * A214354 A188306 A189351

Adjacent sequences: A234647 A234648 A234649 * A234651 A234652 A234653

Keyword

nonn

Author

R. H. Hardin, Dec 29 2013

Status

approved