A232507 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, diagonally or antidiagonally, with no adjacent elements equal

4, 52, 128, 19138, 64290, 105188684, 476578496, 8457919671084, 50905137040126, 9932347839826344524, 79686710905619007242, 170326243514575075459988044, 1825631340786716600141970578, 42650500910965333565149003898471568

Offset

1,1

Comments

Diagonal of A232515

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A232517 A329009 A110908 * A336428 A298073 A233474

Adjacent sequences: A232504 A232505 A232506 * A232508 A232509 A232510

Keyword

nonn

Author

R. H. Hardin, Nov 25 2013

Status

approved