A232330 Number of n X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal

1, 6, 74, 734, 38986, 1047700, 318521414, 21383016966, 41587044818288, 6504751614236146, 87397564422467956534, 30467813258936981061662, 2950963661663407494064125726, 2230955943109246024221388092190

Offset

1,2

Comments

Diagonal of A232335

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for n=5
..1..2..0..1..2....0..1..2..1..0....2..1..0..2..1....0..1..2..1..0
..0..1..2..1..0....0..1..0..2..0....2..1..0..2..0....2..1..2..1..2
..0..1..2..1..0....0..2..0..1..0....2..1..0..1..2....0..1..0..1..2
..0..1..2..1..2....0..1..2..1..0....2..1..2..1..2....2..1..2..1..0
..2..1..2..1..2....2..1..0..2..1....0..1..2..1..0....0..1..0..2..1

Crossrefs

Sequence in context: A058793 A066171 A269647 * A269337 A057783 A317344

Adjacent sequences: A232327 A232328 A232329 * A232331 A232332 A232333

Keyword

nonn

Author

R. H. Hardin, Nov 22 2013

Status

approved