A254888 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically

2540, 8944, 35296, 149931, 516726, 1662439, 5009638, 14250367, 38915696, 101553961, 257394529, 637368852, 1541978175, 3659178294, 8544065101, 19675806469, 44760978714, 100769983174, 224782052971, 497397948395

Offset

1,1

Comments

Column 2 of A254894

Links

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

Example

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

Crossrefs

Sequence in context: A334932 A254021 A254014 * A248997 A234407 A135924

Adjacent sequences: A254885 A254886 A254887 * A254889 A254890 A254891

Keyword

nonn

Author

R. H. Hardin, Feb 10 2015

Status

approved