A223663 T(n,k) = Number of n X k 0..3 arrays with row sums unimodal and column sums inverted unimodal.

4, 16, 16, 50, 256, 50, 130, 3060, 3060, 130, 296, 29922, 141046, 29922, 296, 610, 252912, 5285887, 5285887, 252912, 610, 1163, 1912914, 169756788, 761845474, 169756788, 1912914, 1163, 2083, 13254601, 4836834467, 93974096640, 93974096640

Offset: 1

Author

R. H. Hardin, Mar 25 2013

Keywords

• nonn
• tabl

Comments

Table starts

....4........16............50..............130...............296

...16.......256..........3060............29922............252912

...50......3060........141046..........5285887.........169756788

..130.....29922.......5285887........761845474.......93974096640

..296....252912.....169756788......93974096640....44626165058452

..610...1912914....4836834467...10253839694278.18744540823704239

.1163..13254601..125226945708.1013084819998517

.2083..85563043.2997363216275

.3544.521069404

.5776

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..59