A185430 Number of (n+2)X6 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

212298419684, 41910604337378, 4772160687307074, 378372621022753476, 22687513754718781985, 1081599389409258559731, 42451419931252675522287, 1407901157465200331154523, 40264870455486645310499349

Offset: 1

Author

R. H. Hardin Jan 27 2011

Keywords

• nonn

Comments

Column 4 of A185435

Examples

			Some solutions for 4X6
..0..0..0..0..0..2....0..0..0..0..0..6....0..0..0..0..0..3....0..0..0..0..0..1
..0..0..0..0..0..6....0..0..0..0..1..2....0..0..0..0..0..6....0..0..0..0..0..4
..0..0..0..0..1..2....0..0..0..0..1..5....0..0..0..0..2..3....0..0..0..0..0..4
..0..0..0..0..1..4....0..0..0..0..2..2....0..0..0..0..3..6....0..0..0..0..7..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..114