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 A267162 Number of nX2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west, southwest or northwest neighbor modulo n and the upper left element equal to 0. 0
 1, 0, 0, 8, 411, 30362, 2742512, 317221226, 46165940578, 8303305172988, 1813340078934264 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Column 2 of A267163. LINKS EXAMPLE All solutions for n=4 ..0..0....0..3....0..0....0..0....0..2....0..2....0..2....0..3 ..2..2....3..2....1..3....2..2....2..0....0..2....3..3....1..0 ..3..1....2..1....3..1....3..1....1..1....3..3....1..1....2..1 ..3..1....1..0....2..2....1..3....3..3....1..1....2..0....3..2 CROSSREFS Cf. A267163. Sequence in context: A008274 A188422 A188393 * A193372 A185833 A301668 Adjacent sequences: A267159 A267160 A267161 * A267163 A267164 A267165 KEYWORD nonn AUTHOR R. H. Hardin, Jan 11 2016 STATUS approved

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Last modified March 25 23:47 EDT 2023. Contains 361529 sequences. (Running on oeis4.)