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 A278410 Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes. 1
 15, 2550, 201539, 11454780, 514122657, 20086951472, 724313811311, 24378309172117, 757386980723842, 21490393664858691, 555075804780316188, 13082453926050947533, 282833107470851109743, 5643469565485557711688 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A278414. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=2 ..0..2..0..0. .2..1..2..2. .2..1..0..0. .0..2..2..1. .2..2..0..1 ..0..1..2..2. .2..0..0..2. .2..1..0..0. .1..2..1..2. .2..2..0..0 CROSSREFS Cf. A278414. Sequence in context: A208171 A266571 A308389 * A211902 A200797 A241116 Adjacent sequences:  A278407 A278408 A278409 * A278411 A278412 A278413 KEYWORD nonn AUTHOR R. H. Hardin, Nov 21 2016 STATUS approved

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Last modified July 1 06:11 EDT 2022. Contains 354952 sequences. (Running on oeis4.)