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A234704
Number of (n+1) X (n+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant-stress 1 X 1 tilings).
0
322, 7154, 87698, 1108418, 9883666, 104373122, 850224914, 8324205794
OFFSET
1,1
EXAMPLE
Some solutions for n=3:
6 2 2 2 2 5 4 5 0 5 0 6 3 6 2 3 4 3 5 1
4 6 0 6 4 1 6 1 6 5 6 6 7 4 6 1 2 7 3 5
7 3 3 3 2 5 4 5 1 6 1 7 4 7 3 4 6 5 7 3
4 6 0 6 3 0 5 0 1 0 1 1 6 3 5 0 1 6 2 4
CROSSREFS
Diagonal of A234712.
Sequence in context: A234712 A234705 A324629 * A266885 A253368 A334182
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2013
STATUS
approved