A222905 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

17, 1710, 82020, 21064292, 1616042692, 577820456398, 51666240687220, 19807159813457951, 1817220105168370585, 706854001296049850823, 65258971099531300247508, 25532711765112846282295184

Offset: 1

Author

R. H. Hardin Mar 09 2013

Keywords

• nonn

Comments

Column 7 of A222906

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..25