A185773 Number of (n+1)X4 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

3844, 89118, 2046098, 48744342, 1154712762, 27239862108, 641595944400, 15156754839024, 357869357090800, 8446854770875602, 199334639825139922, 4705555692884330894, 111074885127703334276, 2621814014876365014966

Offset: 1

Author

R. H. Hardin Feb 03 2011

Keywords

• nonn

Comments

Column 3 of A185777

Examples

			Some solutions for 3X4
..2..1..0..2....2..1..1..1....2..2..0..1....1..1..2..2....0..0..0..1
..1..1..0..2....2..0..0..1....2..0..0..2....0..1..1..1....0..1..2..1
..0..0..2..1....1..1..2..2....0..2..1..2....0..1..1..2....1..2..2..0
		

Links

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