A208346 - OEIS

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A208346

Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)

1, 15, 1095, 230387, 191586797, 647640659639

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

OFFSET

1,2

COMMENTS

Diagonal of A208353

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

..0..1..1..0....0..0..1..0....0..0..1..0....0..1..1..1....0..0..0..0

..0..1..2..0....2..1..1..2....0..2..2..1....0..0..1..2....1..1..1..1