A203972 Number of nX5 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by 0 1 to the left or above.

13, 396, 16723, 601521, 22100882, 817293052, 30104480870, 1109867821460, 40918040450898, 1508399380147856, 55608018263653107, 2050003686321969840, 75573742529524147667, 2786045396078461420336, 102708210001323641444431

Offset: 1

Author

R. H. Hardin Jan 08 2012

Keywords

• nonn

Comments

Column 5 of A203975

Examples

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

Links

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