A186910 Number of (n+2)X6 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

22000126445, 2536761070723, 171334955820947, 8185872059408158, 300268014063911584, 8880688768983407407, 219019175194540430058, 4617630757685272558765, 84844963231516976756260

Offset: 1

Author

R. H. Hardin Feb 28 2011

Keywords

• nonn

Comments

Column 4 of A186915

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200
• R. H. Hardin, Polynomial of degree 101

Formula

Polynomial of degree 101 in n, see link.