A232302 Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally

1, 37, 5149, 6363511, 66287652717, 5637591065064585, 3953611274692252664219, 22845060732287997693078487339, 1087328305739985850553848837289874701, 426327214385010895269748977017138080515645751

Offset

1,2

Comments

Diagonal of A232309

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A305142 A125599 A219409 * A363871 A153166 A153168

Adjacent sequences: A232299 A232300 A232301 * A232303 A232304 A232305

Keyword

nonn

Author

R. H. Hardin, Nov 22 2013

Status

approved