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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

(list; graph; refs; listen; history; text; internal format)

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