A208020 Number of n X 5 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).

15, 1657, 5252041, 80318704605, 3662498214110836, 387950830575476495043, 81811898713607232898679186, 30915192640251267259536636853106, 19388812191991157504565482403825817325, 19036318336696557481934278608884237849314405

Offset: 1

Author

R. H. Hardin, Feb 22 2012

Keywords

• nonn

Examples

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

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..50

Crossrefs

Column 5 of A208021.

Extensions

Terms a(6) and beyond from Andrew Howroyd, Jun 25 2017