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 A265419 Number of nX2 arrays containing 2 copies of 0..n-1 with no equal horizontal, vertical, diagonal or antidiagonal neighbors and new values introduced sequentially from 0. 0
 0, 0, 0, 4, 48, 584, 8096, 127296, 2241856, 43770144, 939182976, 21981580224, 557527020544, 15236894019072, 446459870047232, 13964134704426752, 464407462322500608 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Column 2 of A265421. LINKS EXAMPLE Some solutions for n=6 ..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1 ..2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3 ..0..1....1..4....0..4....0..4....4..0....0..4....4..5....1..0....1..4....4..0 ..4..5....3..5....5..2....1..5....5..3....5..2....1..2....4..5....3..5....2..5 ..3..2....0..4....3..1....2..3....1..4....1..4....4..5....2..3....2..4....3..4 ..4..5....5..2....4..5....4..5....5..2....5..3....0..3....4..5....0..5....1..5 CROSSREFS Cf. A265421. Sequence in context: A099671 A196963 A220325 * A226705 A126967 A098402 Adjacent sequences: A265416 A265417 A265418 * A265420 A265421 A265422 KEYWORD nonn AUTHOR R. H. Hardin, Dec 08 2015 STATUS approved

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Last modified March 30 11:15 EDT 2023. Contains 361618 sequences. (Running on oeis4.)