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 A206359 T(n,k)=Number of nXk 0..4 arrays with no element equal to another within two positions in the same row or column, and new values 0..4 introduced in row major order 8
 1, 1, 1, 1, 4, 1, 2, 17, 17, 2, 5, 120, 230, 120, 5, 14, 884, 3284, 3284, 884, 14, 41, 6558, 47060, 91518, 47060, 6558, 41, 122, 48680, 674564, 2545230, 2545230, 674564, 48680, 122, 365, 361422, 9669452, 70894196, 137375464, 70894196, 9669452, 361422, 365 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts ...1......1.........1...........2..............5.............14.............41 ...1......4........17.........120............884...........6558..........48680 ...1.....17.......230........3284..........47060.........674564........9669452 ...2....120......3284.......91518........2545230.......70894196.....1973960628 ...5....884.....47060.....2545230......137375464.....7427049378...401471308746 ..14...6558....674564....70894196.....7427049378...780158903978.81929751806834 ..41..48680...9669452..1973960628...401471308746.81929751806834 .122.361422.138605744.54973461294.21705874723550 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 EXAMPLE Some solutions for n=4 k=3 ..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2 ..3..4..1....1..0..3....3..4..0....1..0..3....1..3..4....2..0..3....2..3..1 ..2..3..0....2..4..0....1..2..3....2..3..4....2..4..0....1..4..0....1..4..0 ..4..0..2....4..1..2....2..1..4....3..2..0....0..1..2....3..1..2....3..0..2 CROSSREFS Column 1 is A007051(n-3) Sequence in context: A299398 A299228 A300040 * A297951 A298560 A298389 Adjacent sequences: A206356 A206357 A206358 * A206360 A206361 A206362 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 06 2012 STATUS approved

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Last modified December 4 13:48 EST 2023. Contains 367563 sequences. (Running on oeis4.)