A265476 Number of nX4 0..n+4-2 arrays with upper left zero and lower right n+4-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.

16, 366, 32400, 1211112, 128323584, 3120703104, 589329511684, 6424959359808, 3010884585054784, 30416313423877920, 16127828989578410896, 78450302166015801792, 89417580553113361553664, 268486460625576403793312

Offset

1,1

Comments

Column 4 of A265480.

Links

R. H. Hardin, Table of n, a(n) for n = 1..47

Example

Some solutions for n=3
..0..5..4..2....0..3..3..3....0..2..3..4....0..4..4..5....0..3..3..3
..4..2..3..2....5..2..4..5....3..2..3..4....3..2..3..2....5..2..4..2
..4..2..1..5....3..3..4..5....4..4..3..5....1..5..0..5....4..3..4..5

Crossrefs

Cf. A265480.

Sequence in context: A025759 A276257 A276097 * A008427 A187177 A053105

Adjacent sequences: A265473 A265474 A265475 * A265477 A265478 A265479

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved