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A234164
Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
1
4296, 32070, 236876, 1773484, 13227132, 99877680, 751361300, 5729616704, 43493374260, 335194819624, 2568518101508, 20015511073672, 154853905277996, 1220427512643784, 9532590261966940, 75975862900079592, 598936631627547644
OFFSET
1,1
FORMULA
Empirical recurrence of order 80 (see link above).
EXAMPLE
Some solutions for n=2:
2 0 1 0 2 2 1 4 2 1 0 4 0 4 3 4 4 3 1 4
1 1 0 1 4 2 3 4 3 4 1 3 1 3 4 3 4 1 1 2
3 1 2 1 2 2 1 4 2 1 0 0 2 2 1 2 3 2 4 3
CROSSREFS
Column 3 of A234169.
Sequence in context: A204401 A204400 A271104 * A124596 A224522 A210263
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2013
STATUS
approved