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A278795 Number of n X 4 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1

%I #7 Mar 02 2024 10:43:13

%S 65,34348,7196852,1038462658,118098679534,11262497170744,

%T 935318457135084,69345852411053594,4667384731526157594,

%U 288452158499377948116,16500830203851397115132,878891304960177782094219,43788704970632405698713439,2048518813765704043678494853

%N Number of n X 4 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

%C Column 4 of A278798.

%H R. H. Hardin, <a href="/A278795/b278795.txt">Table of n, a(n) for n = 1..133</a>

%e Some solutions for n=2

%e ..3..3..0..1. .2..2..3..0. .2..1..2..3. .2..3..0..0. .1..2..3..0

%e ..3..1..0..1. .2..0..1..3. .2..3..1..1. .0..3..3..3. .3..2..3..0

%Y Cf. A278798.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 28 2016

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Last modified June 7 11:42 EDT 2024. Contains 373173 sequences. (Running on oeis4.)