A267915 Number of 4Xn 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.

13, 938, 43972, 2331981, 104491831, 4817531571, 207508204575, 8960112001163, 375426257575299, 15673406360156331, 644971612069289479, 26434347183210422659, 1075438596218448452443, 43616300555346348016639

Offset: 1

Author

R. H. Hardin, Jan 22 2016

Keywords

• nonn

Comments

Row 4 of A267911.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..151

Crossrefs

Cf. A267911.