A203386 Number of n X 5 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

1, 1519, 1644254, 781413998, 307215779816, 133980449920831, 61265314914283103, 27766798777082484160, 12536363302159604534646, 5684379185768992022017820, 2583784784086688090876271693

Offset

1,2

Comments

Column 5 of A203389.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A203389.

Sequence in context: A206654 A356767 A112641 * A157375 A331659 A174746

Adjacent sequences: A203383 A203384 A203385 * A203387 A203388 A203389

Keyword

nonn

Author

R. H. Hardin, Jan 01 2012

Status

approved