A201191 Number of nX4 0..2 arrays with every row and column running average nondecreasing rightwards and downwards but some diagonal running average having a decrease

0, 6, 45, 276, 1742, 10723, 62507, 341239, 1756705, 8615033, 40624254, 185606670, 826641108, 3606104752, 15466501406, 65414240653, 273469830394, 1132219841873, 4649478654934, 18961523046357, 76874485386538, 310096854888262

Offset

1,2

Comments

Column 4 of A201195

Links

R. H. Hardin, Table of n, a(n) for n = 1..48

Example

Some solutions for n=7
..0..0..0..2....0..0..1..1....0..0..0..0....0..0..0..0....0..0..1..2
..0..0..0..2....0..1..1..1....0..0..0..0....0..1..1..2....0..0..1..2
..0..0..0..2....1..1..1..2....0..0..2..2....0..1..1..2....0..1..1..2
..0..1..1..2....2..2..2..2....0..2..1..1....1..1..1..2....1..2..2..2
..2..2..2..2....1..1..2..2....1..1..2..2....1..2..2..2....2..2..2..2
..1..2..2..2....1..1..2..2....1..1..1..1....1..1..1..2....1..1..2..2
..1..1..1..2....2..2..2..2....1..2..2..2....1..2..2..2....2..2..2..2

Crossrefs

Sequence in context: A003486 A262415 A297645 * A214982 A360021 A189801

Adjacent sequences: A201188 A201189 A201190 * A201192 A201193 A201194

Keyword

nonn

Author

R. H. Hardin Nov 28 2011

Status

approved