A222569 Number of n X 4 0..2 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

4, 10, 56, 435, 4790, 50535, 547563, 5815939, 63130202, 676152734, 7328771224, 79083695286, 857913193954, 9302185273377, 101073333908828, 1099637763169027, 11970412457540599, 130557727722965457, 1423911243991041430

Offset: 1

Author

R. H. Hardin Feb 25 2013

Keywords

• nonn

Comments

Column 4 of A222573.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..128

Crossrefs

Cf. A222573.