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A203333 Number of nX3 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 36, 1311, 27056, 532547, 12872510, 327579980, 8009744714, 193577903773, 4737630434523, 116753918774537, 2874720279855525, 70727573042967301, 1741732763961365190, 42927969047213245402, 1058288844307696250301 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 6 06:10 EDT 2020. Contains 333267 sequences. (Running on oeis4.)