A184565 Number of (n+2)X(n+2) 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

14178, 993538, 57374460, 2943827443, 136680720320, 5891845723505, 236912838360594, 8847094859463950, 307617377912743450, 10100655820839334144, 321449766112998837176, 10305126469064160258992

Offset: 1

Author

R. H. Hardin Jan 17 2011

Keywords

• nonn

Comments

Diagonal of A184574

Examples

			Some solutions for 4X4
..0..0..0..0....0..0..0..2....0..0..0..2....0..0..0..0....0..0..0..0
..0..0..1..3....0..0..1..2....0..0..1..3....0..0..1..3....0..0..1..2
..0..2..3..2....1..1..3..3....0..0..2..2....2..2..3..3....0..2..2..2
..3..3..3..0....3..3..3..1....1..3..0..0....3..3..3..3....0..3..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..15