A232362 Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically.

1, 23, 2411, 1704619, 8716796353, 316516682114845, 81520970965131916225, 149039167947057559464970099

Offset

1,2

Comments

Diagonal of A232368

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A132937 A068655 A336170 * A233226 A233446 A088385

Adjacent sequences: A232359 A232360 A232361 * A232363 A232364 A232365

Keyword

nonn

Author

R. H. Hardin, Nov 23 2013

Status

approved