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 A278631 Number of nX5 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
 90, 27521, 3739008, 387551595, 33967584488, 2593097277036, 175644502146694, 10734760074025367, 600850493598843960, 31181144570813141891, 1514424057857433189463, 69299571270775145840652 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A278634. LINKS R. H. Hardin, Table of n, a(n) for n = 1..101 EXAMPLE Some solutions for n=2 ..1..2..1..2..2. .1..1..1..0..2. .0..0..0..2..2. .0..0..0..0..2 ..2..2..2..1..0. .1..2..1..1..0. .0..0..2..2..1. .0..0..2..2..1 CROSSREFS Cf. A278634. Sequence in context: A200503 A199229 A278411 * A323317 A246634 A270508 Adjacent sequences: A278628 A278629 A278630 * A278632 A278633 A278634 KEYWORD nonn AUTHOR R. H. Hardin, Nov 24 2016 STATUS approved

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Last modified July 16 12:01 EDT 2024. Contains 374348 sequences. (Running on oeis4.)