A234435 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

32, 582, 17200, 896112, 72539432, 11533082488, 2561421896376, 1379501791207360, 834355608891492928, 1756003516595468503128

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Diagonal of A234443.

Sequence in context: A316874 A317602 A054338 * A010557 A022756 A332262

Adjacent sequences: A234432 A234433 A234434 * A234436 A234437 A234438

Keyword

nonn

Author

R. H. Hardin, Dec 26 2013

Status

approved