A208047 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any horizontal, vertical or antidiagonal neighbor (colorings ignoring permutations of colors)

14, 128, 1356, 14976, 168096, 1897888, 21472544, 243113056, 2753187616, 31181409632, 353155643424, 3999817236576, 45301793546528, 513087070702432, 5811214258319904, 65817707844947552, 745450199930022688

Offset

1,1

Comments

Column 5 of A208050

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 22*a(n-1) -177*a(n-2) +832*a(n-3) -2664*a(n-4) +5408*a(n-5) -4544*a(n-6) -7936*a(n-7) +24064*a(n-8) -16384*a(n-9) for n>10

Example

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

Crossrefs

Sequence in context: A173408 A166794 A229386 * A301379 A222571 A038841

Adjacent sequences: A208044 A208045 A208046 * A208048 A208049 A208050

Keyword

nonn

Author

R. H. Hardin Feb 22 2012

Status

approved