A208299 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 or antidiagonal neighbor (colorings ignoring permutations of colors).

1, 15, 12840, 87852626, 2227156082842, 148049849095504726, 21183598567292002167082, 5737167377815628378510929822, 2685975192008614716088213333413834, 2031667423243870021802621888823332638846, 2356075680798443401764258655433216618467066594

Offset: 0

Author

R. H. Hardin, Feb 25 2012

Keywords

• nonn

Examples

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

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..100

Crossrefs

Column 5 of A208301.

Extensions

a(0)=1 prepended and terms a(10) and beyond from Andrew Howroyd, May 18 2020