A202163 Number of nX3 0..3 arrays with every row and column running average nondecreasing rightwards and downwards but some diagonal running average having a decrease

0, 4, 55, 752, 8238, 77960, 663054, 5215498, 38678959, 274025004, 1872735358, 12435556049, 80677916282, 513571982149, 3218529210011, 19909810689812, 121825998303075, 738596797827110, 4442877434131554, 26546050939783252

Offset

1,2

Comments

Column 3 of A202168

Links

R. H. Hardin, Table of n, a(n) for n = 1..39

Example

Some solutions for n=6
..0..0..0....0..0..1....0..0..0....0..1..1....0..1..1....0..1..2....0..0..1
..0..0..1....0..2..1....0..0..0....0..1..1....1..1..1....0..1..2....2..2..2
..2..3..3....2..2..3....2..2..2....0..2..2....1..1..1....2..2..2....1..1..2
..1..1..2....1..3..2....1..1..2....0..3..3....1..2..3....1..3..2....2..2..2
..1..2..3....1..3..2....1..2..3....3..3..3....3..3..3....2..2..2....2..2..2
..2..2..3....2..3..3....2..3..3....1..2..3....2..2..3....3..3..3....2..2..2

Crossrefs

Sequence in context: A151576 A204107 A285366 * A073352 A258793 A195634

Adjacent sequences: A202160 A202161 A202162 * A202164 A202165 A202166

Keyword

nonn

Author

R. H. Hardin Dec 13 2011

Status

approved