A222650 Number of nX1 0..3 arrays with no more than floor(nX1/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

1, 1, 2, 11, 34, 131, 438, 2150, 7676, 32491, 116096, 533186, 1945184, 8362152, 30561808, 135650378, 501075616, 2155759835, 7986345032, 34780282521, 129686419290, 555913562689, 2079094345694, 8947148045345, 33609869742022

Offset: 1

Author

R. H. Hardin Feb 27 2013

Keywords

• nonn

Comments

Column 1 of A222654

Examples

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

Links

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