A232399 Number of (n+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or vertically, with no adjacent elements equal

4, 16, 52, 1120, 13532, 798692, 31802528, 5824262024, 752183288216, 442761087574020, 185196365472026896, 352995486371015148824

Offset

1,1

Comments

Diagonal of A232406

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A319775 A375307 A220936 * A223711 A074409 A056589

Adjacent sequences: A232396 A232397 A232398 * A232400 A232401 A232402

Keyword

nonn

Author

R. H. Hardin, Nov 23 2013

Status

approved