A203052 Number of n X 3 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

36, 7820, 1055370, 125838722, 15517802234, 1938869645102, 241217648933826, 29971627049343224, 3725990432226868516, 463261261782859760260, 57594655074793031580852, 7160340394532449129071948

Offset

1,1

Comments

Column 3 of A203057.

Links

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

Example

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

Crossrefs

Cf. A203057.

Sequence in context: A145248 A222974 A013739 * A054407 A268553 A233171

Adjacent sequences: A203049 A203050 A203051 * A203053 A203054 A203055

Keyword

nonn

Author

R. H. Hardin, Dec 28 2011

Status

approved