A207357 Number of nX7 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

1440, 2073600, 1799496100, 1498532240063, 1235754047831188, 1017721314783737845, 839863084228054288788, 693341331552502948137170, 572549877099724874489706731, 472826386920542459653829610429

Offset

1,1

Comments

Column 7 of A207358

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

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

Crossrefs

Sequence in context: A207213 A207207 A206733 * A207200 A119422 A166609

Adjacent sequences: A207354 A207355 A207356 * A207358 A207359 A207360

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved