A254813 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically

2703, 15848, 95110, 522294, 2691838, 13380696, 64480314, 303930381, 1410213321, 6456146026, 29274922610, 131644498910, 588051565327, 2611848137632, 11544090756579, 50807250907962, 222774823957704, 973567869024207

Offset

1,1

Comments

Column 2 of A254819

Links

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

Example

Some solutions for n=3
..0..0..0..1....0..1..0..1....0..0..0..1....0..1..0..1....0..1..0..0
..0..0..1..0....1..0..1..0....0..1..0..0....1..0..0..1....0..0..1..0
..0..0..1..1....0..0..1..1....0..0..0..1....1..0..1..0....1..0..0..1
..0..1..1..0....0..1..1..1....0..0..0..1....0..1..1..0....1..1..1..1
..1..0..1..0....1..1..0..1....1..1..1..1....1..1..1..1....0..1..1..0

Crossrefs

Sequence in context: A214016 A254513 A254506 * A358430 A270542 A250615

Adjacent sequences: A254810 A254811 A254812 * A254814 A254815 A254816

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved