A204307 Number of (n+1)X6 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards

1166400, 209106648, 32895567670, 2692305415538, 211637634795580, 10058642503775705

Offset

1,1

Comments

Column 5 of A204309

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4
..3..2..1..0..1..0....2..3..0..1..2..0....1..1..0..0..3..1....0..3..3..1..2..0
..1..1..3..3..3..3....0..0..2..2..1..3....0..2..3..3..3..2....3..0..1..2..3..3
..2..3..3..1..3..2....2..3..2..1..3..3....2..1..1..0..3..3....0..3..3..3..1..2
..2..1..3..3..3..3....0..1..3..3..2..2....1..2..3..3..3..2....1..2..1..2..3..3
..2..3..3..1..3..2....2..3..2..1..3..3....3..1..3..1..3..3....1..3..3..3..1..3

Crossrefs

Sequence in context: A234554 A192104 A210181 * A233664 A322690 A322680

Adjacent sequences: A204304 A204305 A204306 * A204308 A204309 A204310

Keyword

nonn

Author

R. H. Hardin Jan 14 2012

Status

approved