A233146 Number of nX7 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

2136, 20726079, 231058112982, 2582927810338210, 28884899976580380572, 323040050513644831673711, 3612824935976380302597462081, 40405307424531049882937388071029, 451887251397949341093459133981852269

Offset: 1

Author

R. H. Hardin, Dec 04 2013

Keywords

• nonn

Comments

Column 7 of A233147

Examples

			Some solutions for n=2
..0..0..0..1..0..2..4....0..0..0..1..5..2..1....0..0..0..1..2..5..4
..0..0..0..0..4..0..2....3..0..3..1..1..1..3....3..0..3..5..4..2..5
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210