A186913 Number of (n+2)X9 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

44902749582723, 13921822487031205, 2169936652932512523, 219019175194540430058, 15954040054059557650482, 893383694291331850798966, 40128119810449322920431346, 1491377073810394581396929600

Offset: 1

Author

R. H. Hardin Feb 28 2011

Keywords

• nonn

Comments

Column 7 of A186915

Examples

			Some solutions for 4X9
..0..0..0..0..0..0..0..0..6....0..0..0..0..0..0..0..0..5
..0..0..0..0..0..0..0..2..3....0..0..0..0..0..0..0..0..5
..0..0..0..0..0..0..0..4..2....0..0..0..0..0..0..0..1..1
..0..0..0..0..0..0..0..5..2....0..0..0..0..0..0..0..1..6
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..9