A206573 Number of nX4 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal

232, 53824, 9509750, 1665431164, 290967246344, 50835598921675, 8882668617521828, 1552079697677787063, 271191336278876503161, 47384416611699348366558, 8279310662890040257782573

Offset

1,1

Comments

Column 4 of A206577

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A206970 A206976 A206963 * A207578 A209088 A207053

Adjacent sequences: A206570 A206571 A206572 * A206574 A206575 A206576

Keyword

nonn

Author

R. H. Hardin Feb 09 2012

Status

approved