A254914 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically

512, 19890, 1041262, 28576911, 549282376, 7539746842, 82012007541, 1556819513546, 17747014175801, 264891745874783, 7544378754973669, 128524099836716025, 1084428849732639859, 284665689827815340390

Offset

1,1

Comments

Diagonal of A254922

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A096962 A231308 A254735 * A186831 A236215 A254182

Adjacent sequences: A254911 A254912 A254913 * A254915 A254916 A254917

Keyword

nonn

Author

R. H. Hardin, Feb 10 2015

Status

approved