A223883 Number of nX3 0..2 arrays with row sums unimodal and column sums inverted unimodal

22, 564, 11250, 187019, 2718572, 35673854, 431939504, 4901224903, 52724142720, 542458862253, 5374667759935, 51561822161831, 481068900940649, 4380767665324085, 39052633428110362, 341657170980967653

Offset

1,1

Comments

Column 3 of A223885

Links

R. H. Hardin, Table of n, a(n) for n = 1..47

Example

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

Crossrefs

Sequence in context: A271266 A333899 A239652 * A223890 A240369 A159875

Adjacent sequences: A223880 A223881 A223882 * A223884 A223885 A223886

Keyword

nonn

Author

R. H. Hardin Mar 28 2013

Status

approved