A221247 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.

0, 64, 1056, 45369, 1337130, 44315649, 1404725868, 45215769600, 1447056039456, 46405605611556, 1487038748557464, 47664362071029636, 1527638149928473128, 48962472488029102500, 1569278944309473869112, 50296658362620611720256

Offset: 1

Author

R. H. Hardin Jan 06 2013

Keywords

• nonn

Comments

Row 3 of A221245

Examples

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

Links

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