A256802 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1

32, 312, 5891, 187203, 10791281, 1138136868, 215464267564, 73460897153458, 45244446929195903, 50270946310754652511, 100729046029931700116928, 364111018909574379029951571, 2374431276261700527941601475769

Offset

1,1

Comments

Diagonal of A256810

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A256810

Sequence in context: A061958 A050279 A096764 * A199532 A165004 A244867

Adjacent sequences: A256799 A256800 A256801 * A256803 A256804 A256805

Keyword

nonn

Author

R. H. Hardin, Apr 10 2015

Status

approved