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A234669
Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
1
29568, 217968, 1604020, 11826092, 87273500, 644848264, 4769561472, 35319420856, 261811840168, 1942988877232, 14433959951680, 107349012026192, 799169229326556, 5956201429623128, 44434739229424040, 331862990142839740
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=1:
2 6 2 4 6 4 2 4 5 1 0 0 1 4 5 4 4 4 3 2
3 3 3 1 6 0 2 0 2 2 5 1 6 5 2 5 7 3 6 1
CROSSREFS
Column 3 of A234672.
Sequence in context: A232201 A251563 A022200 * A031656 A236734 A236317
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2013
STATUS
approved