A185468 Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

1169, 21834, 308692, 3959167, 46410729, 493061605, 4845252741, 45945546278, 443977171724, 4605035061272, 52677880798334, 659609567593921, 8802320668197926, 122014363451316512, 1727721369461575287

Offset

1,1

Comments

Diagonal of A185477

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for 4X4
..0..0..0..2....0..0..0..0....0..0..2..2....0..0..0..2....0..0..1..1
..0..0..1..2....1..1..1..2....0..0..2..2....0..1..2..2....0..1..1..1
..0..1..1..2....1..1..2..0....0..0..2..2....0..2..1..1....0..1..1..2
..1..2..2..0....1..1..2..1....1..1..1..2....0..2..1..1....2..2..2..0

Crossrefs

Sequence in context: A185477 A185469 A065656 * A209825 A264688 A043432

Adjacent sequences: A185465 A185466 A185467 * A185469 A185470 A185471

Keyword

nonn

Author

R. H. Hardin Jan 28 2011

Status

approved