A274894 Number of nX7 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

32, 972, 465, 2291, 10337, 49697, 237807, 1143185, 5539989, 26833885, 130079497, 632358111, 3069896886, 14919608999, 72537188422, 352492355625, 1713947371548, 8332597817985, 40508772974972, 196969575853783, 957632906229433

Offset: 1

Author

R. H. Hardin, Jul 10 2016

Keywords

• nonn

Comments

Column 7 of A274895.

Examples

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

Links

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

Crossrefs

Cf. A274895.