A198911 Number of nX5 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.

15, 10867, 54381563, 481871809749, 4717456775959530, 46891073386615240710, 467181941240736711604077, 4656280284540702751242128730, 46410545076265038917843608182171, 462591920649454036671348839366018986

Offset: 1

Author

R. H. Hardin Oct 31 2011

Keywords

• nonn

Comments

Column 5 of A198914

Examples

			Some solutions with values 0 to 7 for n=3
..0..1..2..3..2....0..1..2..3..4....0..1..0..2..3....0..1..2..3..4
..1..0..3..2..3....1..0..5..1..6....1..0..3..4..5....1..0..5..2..3
..2..4..5..6..7....0..7..4..3..1....6..4..2..7..0....0..6..3..5..7
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..24