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.

73984, 1648656, 30294016, 635846656, 12465275904, 249872016384, 4910514177024, 97652975330304, 1928407075431424, 38241122864997376, 755959578691609600, 14964039006030816256, 295846953794462196736, 5852653217025122329600

Offset

1,1

Comments

Column 4 of A256735.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 78

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

Adjacent sequences: A256728 A256729 A256730 * A256732 A256733 A256734

Keyword

nonn

Author

R. H. Hardin, Apr 09 2015

Status

approved