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A256731
Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum zero and no antidiagonal sum three.
1
73984, 1648656, 30294016, 635846656, 12465275904, 249872016384, 4910514177024, 97652975330304, 1928407075431424, 38241122864997376, 755959578691609600, 14964039006030816256, 295846953794462196736, 5852653217025122329600
OFFSET
1,1
COMMENTS
Column 4 of A256735.
FORMULA
Empirical recurrence of order 78 (see link above).
EXAMPLE
Some solutions for n=1
..0..1..0..0..0..0....0..1..1..0..1..0....1..0..1..1..0..1....0..1..0..1..0..1
..0..1..1..1..0..0....0..0..1..0..1..0....0..0..0..0..0..0....1..0..0..1..1..0
..0..1..0..1..0..1....1..1..1..0..1..0....1..0..1..1..1..0....1..0..1..0..1..1
CROSSREFS
Cf. A256735.
Sequence in context: A172927 A172949 A172703 * A186835 A239587 A122065
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 09 2015
STATUS
approved