A222901 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

1, 7, 45, 767, 4909, 119393, 759891, 20299463, 130579169, 3588643955, 23230932391, 647426033879, 4209052934053, 118324983126455, 771976078016995, 21829828686370139, 142850851773130033, 4056660324820606967

Offset: 1

Author

R. H. Hardin Mar 09 2013

Keywords

• nonn

Comments

Column 3 of A222906

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210