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

1,1

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

Links

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

Example

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

Crossrefs

Column 1 is A223718

Sequence in context: A223742 A223725 A223831 * A223892 A223789 A223975

Adjacent sequences: A223882 A223883 A223884 * A223886 A223887 A223888

Keyword

nonn,tabl

Author

R. H. Hardin Mar 28 2013

Status

approved