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A235090
Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
0
80, 656, 3832, 21264, 102336, 524728, 2420288, 12147808, 55604120, 276524288, 1267295968, 6262860184
OFFSET
1,1
EXAMPLE
Some solutions for n=4:
2 1 2 3 5 0 2 3 4 2 1 3 1 2 0 3 2 1 4 3
0 3 0 5 3 2 0 5 2 4 3 1 3 0 2 5 0 3 2 5
2 1 2 3 5 0 2 3 4 2 2 4 2 3 1 2 1 0 3 2
0 3 0 5 3 2 0 5 2 4 5 3 5 2 4 5 0 3 2 5
1 0 1 2 4 1 3 4 5 3 2 4 2 3 1 3 2 1 4 3
CROSSREFS
Diagonal of A235098.
Sequence in context: A342188 A255478 A204342 * A211693 A164753 A279745
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2014
STATUS
approved