A231102 Number of n X n 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, no adjacent elements equal, and upper left element zero

0, 0, 8, 438, 75346, 48463174, 110728004898, 879549454424322, 24425156030389837162, 2380336656518678938694450, 814656324267500393611361701060

Offset

1,3

Comments

Diagonal of A231108

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A371560 A007701 A101356 * A231824 A069442 A215527

Adjacent sequences: A231099 A231100 A231101 * A231103 A231104 A231105

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved