A203344 Number of nX6 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 2329, 2566719, 1288066857, 643689050030, 360171255368417, 202012748290560363, 111992397576647615102, 62386916161252471722500, 34899624501636294504733677, 19521405552266756242548467057

Offset

1,2

Comments

Column 6 of A203346

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A186058 A309672 A238175 * A178552 A166581 A237387

Adjacent sequences: A203341 A203342 A203343 * A203345 A203346 A203347

Keyword

nonn

Author

R. H. Hardin Dec 31 2011

Status

approved