A254901 - OEIS

A254901

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2423, 5939, 13444, 36387, 81620, 146168, 268310, 501323, 877772, 1500214, 2577866, 4340587, 7207565, 11943999, 19714780, 32343730, 52955133, 86341286, 140200593, 227653644, 369372492, 597897682, 966780341, 1562278934, 2521602334

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 2 of A254907

LINKS

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

EXAMPLE

Some solutions for n=4

..0..1..0..1....0..0..0..0....1..0..0..0....0..0..0..1....0..1..1..1

..0..0..0..0....0..0..1..1....0..0..0..1....1..1..0..0....0..0..0..1

..1..1..1..0....1..0..1..0....0..1..0..0....0..1..0..0....1..1..0..0

..1..1..1..0....1..1..1..0....0..1..0..0....0..1..1..1....0..1..1..1

..0..1..1..0....0..1..0..0....1..1..0..0....1..1..1..0....0..1..1..0

..1..1..0..1....0..1..0..1....1..1..1..1....1..1..1..1....0..1..1..1

CROSSREFS

Sequence in context: A097030 A204367 A131759 * A254908 A257203 A156120

Adjacent sequences: A254898 A254899 A254900 * A254902 A254903 A254904

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2015

STATUS

approved