A255784 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0

90, 270, 1050, 5240, 43838, 597517, 10902535, 269859998, 9457603649, 445467783893, 28246525232387, 2468916391423971, 294108187486101498, 47388808850139510459, 10427427542156971913615, 3130608690589739846073241

Offset

1,1

Comments

Diagonal of A255792

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=4
..0..1..1..1..0..1....1..1..1..0..1..1....1..1..0..1..1..1....1..0..1..1..1..0
..1..1..1..0..1..0....0..1..0..1..0..1....1..0..1..0..1..1....1..1..0..1..0..1
..1..1..0..1..0..1....1..0..1..0..1..1....1..1..0..1..0..1....1..0..1..0..1..0
..1..0..1..0..1..0....1..1..0..1..0..1....1..1..1..0..1..1....1..1..0..1..0..1
..1..1..0..1..0..1....1..0..1..0..1..1....0..1..1..1..1..1....1..1..1..0..1..1
..1..0..1..1..1..0....1..1..0..1..1..1....1..0..1..1..1..0....0..1..1..1..1..1

Crossrefs

Cf. A255792

Sequence in context: A231961 A237131 A363729 * A250877 A250878 A027621

Adjacent sequences: A255781 A255782 A255783 * A255785 A255786 A255787

Keyword

nonn

Author

R. H. Hardin, Mar 06 2015

Status

approved