A202636 T(n,k)=Number of nXk 0..3 arrays with adjacent row and column sums unequal.

4, 12, 12, 36, 184, 36, 108, 2428, 2428, 108, 324, 32676, 143028, 32676, 324, 972, 443100, 8196796, 8196796, 443100, 972, 2916, 5967248, 464590190, 1960824272, 464590190, 5967248, 2916, 8748, 80018540, 26143599304, 459796683544

Offset: 1

Author

R. H. Hardin Dec 21 2011

Keywords

• nonn
• tabl

Comments

Table starts

.....4.........12............36.............108.............324.............972

....12........184..........2428...........32676..........443100.........5967248

....36.......2428........143028.........8196796.......464590190.....26143599304

...108......32676.......8196796......1960824272....459796683544.106682611433736

...324.....443100.....464590190....459796683544.443471777729100

...972....5967248...26143599304.106682611433736

..2916...80018540.1464347535012

..8748.1071819720

.26244

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..49