A202888 Number of nX7 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

292, 701275, 922352267, 1137589582096, 1452080571954205, 1855037301620277541, 2365289879500027706428, 3016217753359820252116493, 3846628606342304091797101743, 4905606162973199116333144693744

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Column 7 of A202889.

Sequence in context: A098249 A190925 A232280 * A217181 A155140 A248210

Adjacent sequences: A202885 A202886 A202887 * A202889 A202890 A202891

Keyword

nonn

Author

R. H. Hardin, Dec 25 2011

Status

approved