A223885 T(n,k)=Number of nXk 0..2 arrays with row sums unimodal and column sums inverted unimodal.

3, 9, 9, 22, 81, 22, 46, 564, 564, 46, 86, 3298, 11250, 3298, 86, 148, 17048, 187019, 187019, 17048, 148, 239, 80412, 2718572, 8872648, 2718572, 80412, 239, 367, 353485, 35673854, 367614623, 367614623, 35673854, 353485, 367, 541, 1469903, 431939504

Offset: 1

Author

R. H. Hardin Mar 28 2013

Keywords

• nonn
• tabl

Comments

Table starts

...3.......9.........22...........46............86...........148

...9......81........564.........3298.........17048.........80412

..22.....564......11250.......187019.......2718572......35673854

..46....3298.....187019......8872648.....367614623...13705619321

..86...17048....2718572....367614623...43524907508.4637374623582

.148...80412...35673854..13705619321.4637374623582

.239..353485..431939504.469700382368

.367.1469903.4901224903

.541.5845411

.771

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..60

Crossrefs

Column 1 is A223718