A254579 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and the central column and the two maximums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 17125, 774168, 58920922, 7610621332, 1782085332862, 738710766470176, 542677263491039766, 713943639208462145009, 1680972883461652913399702, 7102138169908083180646725958, 53965518477796676606255343307032

Offset

1,1

Comments

Diagonal of A254586

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A329894 A258523 A257147 * A195657 A072369 A140251

Adjacent sequences: A254576 A254577 A254578 * A254580 A254581 A254582

Keyword

nonn

Author

R. H. Hardin, Feb 01 2015

Status

approved