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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) 0
 1, 15, 1095, 230387, 191586797, 647640659639 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A208353 LINKS 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 ..0..2..2..2....2..3..1..0....3..3..3..0....3..3..3..3....2..2..2..3 ..3..1..2..0....2..3..3..2....1..3..0..0....1..2..1..2....0..2..3..0 CROSSREFS Sequence in context: A203409 A207980 A131313 * A236329 A129764 A027552 Adjacent sequences:  A208343 A208344 A208345 * A208347 A208348 A208349 KEYWORD nonn AUTHOR R. H. Hardin Feb 25 2012 STATUS approved

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Last modified August 18 21:11 EDT 2022. Contains 356215 sequences. (Running on oeis4.)