A255151 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1

28, 158, 1637, 24076, 538898, 18908787, 1010639534, 83099387548, 10579222514675, 2071872696148188, 624365603902164824, 290214158710091827505, 207944632244724181029851, 229540322271259189329446842

Offset

1,1

Comments

Diagonal of A255159

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Cf. A255159

Sequence in context: A015881 A026910 A172220 * A184607 A215699 A220158

Adjacent sequences: A255148 A255149 A255150 * A255152 A255153 A255154

Keyword

nonn

Author

R. H. Hardin, Feb 15 2015

Status

approved