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A235231
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 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
0
120, 1288, 9656, 77368, 496520, 3512000, 21123784, 140450408, 822331208, 5291121256
OFFSET
1,1
COMMENTS
Diagonal of A235239.
EXAMPLE
Some solutions for n=4:
3 2 5 2 3 4 1 5 1 6 3 5 3 6 2 4 2 4 1 5
1 6 3 6 1 3 6 4 6 5 5 1 5 2 4 2 6 2 5 3
3 2 5 2 3 4 1 5 1 6 1 3 1 4 0 5 3 5 2 6
1 6 3 6 1 1 4 2 4 3 5 1 5 2 4 0 4 0 3 1
3 2 5 2 3 3 0 4 0 5 2 4 2 5 1 4 2 4 1 5
CROSSREFS
Sequence in context: A371107 A371051 A259519 * A348216 A167549 A052776
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved