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

1,1

Comments

Row 4 of A267911.

Links

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

Example

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

Crossrefs

Cf. A267911.

Sequence in context: A197068 A337575 A274544 * A358983 A096084 A203708

Adjacent sequences: A267912 A267913 A267914 * A267916 A267917 A267918

Keyword

nonn

Author

R. H. Hardin, Jan 22 2016

Status

approved