A203387 Number of n X 6 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

1, 11585, 50848495, 87523201775, 133980449920831

Offset

1,2

Comments

Column 6 of A203389.

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=4
..5..6..6..5..5..3....2..2..5..5..3..1....3..3..3..6..6..1....6..6..4..0..4..4
..5..6..6..1..5..3....2..0..5..5..6..6....6..6..5..6..6..3....6..6..6..0..5..5
..2..3..4..0..5..5....5..5..1..6..6..6....6..6..2..6..6..3....4..6..6..1..5..5
..0..0..4..4..5..5....5..5..1..6..6..0....3..3..0..4..4..0....0..5..5..0..3..3

Crossrefs

Cf. A203389.

Sequence in context: A066055 A371390 A184685 * A218105 A226905 A162865

Adjacent sequences: A203384 A203385 A203386 * A203388 A203389 A203390

Keyword

nonn

Author

R. H. Hardin, Jan 01 2012

Status

approved