A222912 Number of 7Xn 0..3 arrays with no more than floor(7Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

715, 15919, 759891, 105327353, 4854855483, 997770825049, 51666240687220, 11720702848290810, 667162032011395790, 166939045536469920335

Offset: 1

Author

R. H. Hardin Mar 09 2013

Keywords

• nonn

Comments

Row 7 of A222906

Examples

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