A203877 Number of (n+1)X8 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

3188647, 4631370535, 6726865579687, 9803443695486967, 14294949784964335495, 20848169781599252276647, 30407052005824642303153447, 44349315527117554056938865367, 64684656141868016921281663326727

Offset

1,1

Comments

Column 7 of A203878

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=4
..0..1..0..1..1..0..2..3....0..1..0..2..1..0..1..0....0..0..1..0..0..1..0..2
..2..1..2..3..2..0..1..3....2..2..3..3..1..0..1..0....3..2..1..2..2..3..0..1
..2..0..0..3..1..0..2..2....0..0..1..2..1..3..1..2....0..0..3..3..1..1..2..1
..2..3..1..2..2..3..1..1....1..2..1..2..0..0..1..0....1..1..1..0..0..3..0..1
..1..3..0..0..1..3..2..3....3..2..1..2..1..3..1..3....2..0..2..2..1..1..0..2

Crossrefs

Sequence in context: A234449 A204629 A235070 * A032783 A034638 A122034

Adjacent sequences: A203874 A203875 A203876 * A203878 A203879 A203880

Keyword

nonn

Author

R. H. Hardin Jan 07 2012

Status

approved