A233403 Number of (n+1)X(2+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal

11, 37, 35, 100, 265, 293, 756, 1937, 2346, 5788, 14533, 18598, 44777, 110861, 147478, 349309, 854388, 1171388, 2739451, 6632534, 9314701, 21564727, 51751900, 74137387, 170211322, 405346970, 590489477, 1346189954, 3184156943, 4705761017

Offset

1,1

Comments

Column 2 of A233408

Links

R. H. Hardin, Table of n, a(n) for n = 1..199

Example

Some solutions for n=5
..1..0..2....1..0..1....1..0..2....1..2..0....0..2..1....1..0..1....0..2..0
..2..1..0....0..2..0....0..2..1....0..1..2....2..1..0....0..1..2....1..0..1
..0..2..1....1..0..1....1..0..2....1..2..1....1..0..2....1..2..0....0..1..2
..1..0..2....0..1..2....2..1..0....2..0..2....0..2..1....2..0..1....1..2..0
..0..2..1....1..2..0....1..0..2....1..2..1....1..0..2....1..2..0....2..0..1
..2..1..2....2..1..2....0..2..1....2..0..2....2..1..0....0..1..2....0..1..2

Crossrefs

Sequence in context: A366921 A306498 A195201 * A054293 A072859 A125744

Adjacent sequences: A233400 A233401 A233402 * A233404 A233405 A233406

Keyword

nonn

Author

R. H. Hardin, Dec 09 2013

Status

approved