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A235311
Number of (n+1) X (n+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).
0
112, 1120, 5968, 40144, 184144, 1062832, 4632208, 24862768, 106979152, 553292080, 2391038608
OFFSET
1,1
EXAMPLE
Some solutions for n=4:
6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 4 2 4 2 5
4 6 2 5 3 2 0 2 1 5 1 5 1 6 2 1 6 1 6 2
6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 3 1 3 1 4
4 6 2 5 3 3 1 3 2 6 0 4 0 5 1 1 6 1 6 2
6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 3 1 3 1 4
CROSSREFS
Diagonal of A235319.
Sequence in context: A206311 A343372 A330418 * A008430 A249004 A249469
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved