A268007 Number of nX3 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

4, 159, 7445, 381958, 18691624, 911680225, 43653230106, 2074179818184, 97646068246936, 4569116947346091, 212625847203245237, 9853280365275338623, 455001756707087106187, 20951793886914002899807, 962541121729004548522176

Offset: 1

Author

R. H. Hardin, Jan 24 2016

Keywords

• nonn

Comments

Column 3 of A268009.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 75

Crossrefs

Cf. A268009.

Formula

Empirical recurrence of order 75 (see link above)