A267907 Number of nX3 0..2 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.

4, 96, 2304, 43972, 754852, 12017350, 181535822, 2638824216, 37263580006, 514648921140, 6985835894832, 93540620739538, 1238999184320608, 16269402566811754, 212148448282604414, 2750808905345217294

Offset: 1

Author

R. H. Hardin, Jan 22 2016

Keywords

• nonn

Comments

Column 3 of A267911.

Examples

			Some solutions for n=4
..0..1..1....0..0..1....0..1..2....0..1..1....0..0..1....0..1..2....0..1..2
..2..2..1....2..1..1....2..1..2....1..0..0....0..0..1....1..0..0....0..1..1
..1..0..2....2..1..0....1..0..2....2..0..1....0..1..1....1..2..0....0..0..2
..2..0..1....0..2..1....2..1..0....0..0..2....0..0..2....2..1..0....0..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 54

Crossrefs

Cf. A267911.

Formula

Empirical recurrence of order 54 (see link above)