A204308 Number of (n+1)X7 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards

7157160, 2204400210, 592113170884, 78592862286558, 10058642503775705

Offset

1,1

Comments

Column 6 of A204309

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A178214 A137599 A151937 * A288481 A286010 A184214

Adjacent sequences: A204305 A204306 A204307 * A204309 A204310 A204311

Keyword

nonn

Author

R. H. Hardin Jan 14 2012

Status

approved