A203333 Number of nX3 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 36, 1311, 27056, 532547, 12872510, 327579980, 8009744714, 193577903773, 4737630434523, 116753918774537, 2874720279855525, 70727573042967301, 1741732763961365190, 42927969047213245402, 1058288844307696250301

Offset

1,2

Comments

Column 3 of A203338

Links

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

Example

Some solutions for n=4
..2..4..4....4..4..2....5..5..1....2..2..2....5..5..0....2..3..3....1..1..1
..3..5..5....4..4..2....5..5..1....2..1..2....5..5..3....5..5..4....2..2..1
..5..5..5....1..5..5....3..3..1....5..5..4....3..5..5....5..5..4....2..3..3
..5..5..1....0..5..5....0..1..1....5..5..4....0..5..5....1..4..4....0..3..3

Crossrefs

Sequence in context: A255821 A209042 A283729 * A226772 A158739 A218518

Adjacent sequences: A203330 A203331 A203332 * A203334 A203335 A203336

Keyword

nonn

Author

R. H. Hardin Dec 31 2011

Status

approved