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A235240
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, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
0
210, 3146, 31858, 338282, 2965442, 28726138, 243061138, 2245014658
OFFSET
1,1
COMMENTS
Diagonal of A235248.
EXAMPLE
Some solutions for n=3:
1 6 3 2 1 6 4 7 7 2 7 2 5 3 5 2 4 1 5 2
5 4 7 0 2 1 5 2 5 6 5 6 0 4 0 3 1 4 2 5
2 7 4 3 0 5 3 6 0 7 0 7 3 1 3 0 5 2 6 3
5 4 7 0 3 2 6 3 5 6 5 6 2 6 2 5 2 5 3 6
CROSSREFS
Cf. A235248.
Sequence in context: A024407 A027822 A024449 * A103604 A257711 A061133
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2014
STATUS
approved