A201148 Number of n X n 0..2 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally.

3, 20, 235, 4572, 153796, 9005581, 938925282, 177169920997, 61277532455559

Offset

1,1

Comments

Diagonal of A201155

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..0..0..2..1....0..0..0..0....0..0..0..0....0..0..1..1....0..0..0..2
..0..0..2..2....0..0..0..0....0..0..0..1....0..0..1..2....0..0..0..2
..0..2..2..2....0..0..2..1....0..0..1..1....2..2..2..2....1..1..1..2
..1..1..2..2....0..0..1..1....0..0..2..2....2..2..2..2....2..2..2..2

Crossrefs

Sequence in context: A240957 A335871 A195135 * A248653 A218374 A385830

Adjacent sequences: A201145 A201146 A201147 * A201149 A201150 A201151

Keyword

nonn

Author

R. H. Hardin, Nov 27 2011

Status

approved