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 A221433 Number of nX3 1..(max n,3) arrays with each row and column having unrepeated values 1
 6, 12, 12, 576, 66240, 15321600, 5411750400, 2834466324480, 2102110586634240, 2130686007341875200, 2866934087721639936000, 4998512704699099643904000, 11064050379110706817558118400, 30552674703715743883429360435200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A221438. REFERENCES RJ Stones, S Lin, X Liu, G Wang, On Computing the Number of Latin Rectangles, Graphs and Combinatorics, Graphs and Combinatorics (2016) 32:1187-1202; DOI 10.1007/s00373-015-1643-1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..58 EXAMPLE Some solutions for n=3 ..3..2..1....1..2..3....1..2..3....3..1..2....1..3..2....2..1..3....2..3..1 ..2..1..3....2..3..1....3..1..2....2..3..1....3..2..1....3..2..1....1..2..3 ..1..3..2....3..1..2....2..3..1....1..2..3....2..1..3....1..3..2....3..1..2 CROSSREFS Cf. A221438. Sequence in context: A028588 A327569 A338560 * A335485 A004749 A107687 Adjacent sequences: A221430 A221431 A221432 * A221434 A221435 A221436 KEYWORD nonn AUTHOR R. H. Hardin Jan 16 2013 STATUS approved

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Last modified May 29 22:05 EDT 2023. Contains 363042 sequences. (Running on oeis4.)