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A234229
Number of (n+1) X (2+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).
1
5260, 57912, 635904, 7024396, 77499592, 859364784, 9519608332, 106004400596, 1179099470276, 13187924142144, 147315983416148, 1655281003229696, 18571590872945184, 209665693338667564, 2362943030591289236
OFFSET
1,1
FORMULA
Empirical recurrence of order 40 (see link above).
EXAMPLE
Some solutions for n=2:
0 4 6 3 4 3 7 4 7 5 0 7 2 1 2 6 5 3 7 6 7
2 3 2 1 5 7 6 6 6 5 3 7 4 6 4 0 2 3 5 1 5
1 5 1 3 4 3 7 4 7 5 0 7 0 5 0 2 7 5 4 3 4
CROSSREFS
Column 2 of A234233.
Sequence in context: A256745 A206165 A206379 * A143936 A204281 A251901
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 21 2013
STATUS
approved