A231289 Number of 6Xn 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

0, 0, 2722, 278758, 56442770, 12128733980, 2336016267460, 456996951981462, 90300361357430744, 17782945733891880724, 3500020956770127070018, 689152311809440418420484, 135697110109352656409210304

Offset

1,3

Comments

Row 6 of A231285

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Sequence in context: A234551 A167836 A290644 * A212725 A031608 A350047

Adjacent sequences: A231286 A231287 A231288 * A231290 A231291 A231292

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved