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 A278731 Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake. 1
 456, 121520, 28637916, 6410559865, 1351385130108, 268284486351027, 50067074390669892, 8732216738504713198, 1415177080112634284232, 212485358907612452321760, 29562031801069787043980684 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A278734. LINKS R. H. Hardin, Table of n, a(n) for n = 1..50 EXAMPLE Some solutions for n=2 ..1..3..3..2..1. .1..3..2..2..0. .3..1..2..1..0. .3..2..1..0..0 ..3..2..2..3..1. .2..1..1..0..2. .3..2..0..1..0. .0..1..2..1..1 CROSSREFS Cf. A278734. Sequence in context: A048110 A282101 A037945 * A282047 A278433 A278551 Adjacent sequences:  A278728 A278729 A278730 * A278732 A278733 A278734 KEYWORD nonn AUTHOR R. H. Hardin, Nov 27 2016 STATUS approved

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Last modified February 25 02:54 EST 2020. Contains 332217 sequences. (Running on oeis4.)