A267930 Number of nX3 0..3 arrays with every repeated value in every row and column greater than the previous repeated value.

60, 3600, 178068, 8459154, 376812420, 16109362560, 663451196118, 26507885328672, 1031599522028772, 39244717326244854, 1463429227285701348, 53613261264275522982, 1933276790525967340428, 68725772580648925008792

Offset: 1

Author

R. H. Hardin, Jan 22 2016

Keywords

• nonn

Comments

Column 3 of A267933.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 81

Crossrefs

Cf. A267933.

Formula

Empirical recurrence of order 81 (see link above)