A265458 T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

1, 2, 2, 12, 18, 12, 66, 250, 250, 66, 360, 3358, 7422, 3358, 360, 1864, 42282, 216466, 216466, 42282, 1864, 9358, 502154, 6056182, 13943772, 6056182, 502154, 9358, 45642, 5710302, 161435322, 871209026, 871209026, 161435322, 5710302, 45642

Offset: 1

Author

R. H. Hardin, Dec 09 2015

Keywords

• nonn
• tabl

Comments

Table starts

....1.......2.........12............66..............360................1864

....2......18........250..........3358............42282..............502154

...12.....250.......7422........216466..........6056182...........161435322

...66....3358.....216466......13943772........871209026.........52509347006

..360...42282....6056182.....871209026.....122895678174......16879041018070

.1864..502154..161435322...52509347006...16879041018070....5327856426356284

.9358.5710302.4148236142.3073046007824.2268041942592142.1653688201339124766

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..144