A202887 Number of nX6 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

121, 96941, 45332961, 19914296913, 9024909392725, 4095290003129296, 1855037301620277541, 840314045399310110892, 380686256792369384392819, 172460622525800448862240139, 78128840457226148615810468318

Offset

1,1

Links

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

Example

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

Crossrefs

Column 6 of A202889.

Sequence in context: A218287 A129450 A232279 * A195275 A082489 A360504

Adjacent sequences: A202884 A202885 A202886 * A202888 A202889 A202890

Keyword

nonn

Author

R. H. Hardin, Dec 25 2011

Status

approved