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A234874
Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
0
32, 148, 472, 3336, 12208, 261384, 1035792, 98517200, 394703128, 170944136648, 684393189840, 1274659858736120, 5100387102322576
OFFSET
1,1
EXAMPLE
Some solutions for n=4:
1 0 2 0 2 2 0 2 1 2 1 0 1 0 1 2 0 1 0 1
3 1 4 3 4 4 3 4 2 4 3 1 3 1 3 3 2 4 2 4
1 0 2 0 2 3 1 3 0 3 1 0 1 0 1 2 0 1 0 1
3 1 4 3 4 4 3 4 2 4 4 2 4 2 4 3 2 4 2 4
1 0 2 0 2 2 0 2 1 2 1 0 3 0 3 2 0 1 0 3
CROSSREFS
Diagonal of A234882.
Sequence in context: A097199 A100165 A100173 * A220975 A100172 A234132
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2014
STATUS
approved