A255026 Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1

2853, 23077, 206739, 1669286, 13460633, 110131505, 896763036, 7301549016, 59570598618, 485457428280, 3954090473055, 32222610105483, 262627685087211, 2140187356615066, 17439608164244753, 142114394703257737

Offset

1,1

Comments

Column 7 of A255027

Links

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

Example

Some solutions for n=2
..1..1..1..1..1..1..1..1..1....1..1..1..1..1..0..1..1..0
..1..0..1..1..0..1..1..1..1....0..1..1..1..1..1..1..1..1
..1..1..1..1..1..1..0..1..1....1..1..1..1..0..1..1..1..1
..1..1..1..1..1..1..1..1..1....1..0..1..1..1..1..1..0..1

Crossrefs

Cf. A255027

Sequence in context: A259296 A374373 A020429 * A345588 A345846 A233788

Adjacent sequences: A255023 A255024 A255025 * A255027 A255028 A255029

Keyword

nonn

Author

R. H. Hardin, Feb 13 2015

Status

approved