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

1,1

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

Links

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

Example

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

Crossrefs

Sequence in context: A223811 A223762 A223850 * A224113 A223876 A223801

Adjacent sequences: A223660 A223661 A223662 * A223664 A223665 A223666

Keyword

nonn,tabl

Author

R. H. Hardin, Mar 25 2013

Status

approved