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A278796 Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1

%I

%S 456,468496,263134490,118098679534,44796204800108,14688350983557860,

%T 4251350673984802232,1107217648453587546275,263642550140680566002158,

%U 58107335402584370952018686,11961631714090690343312623434

%N Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

%C Column 5 of A278798.

%H R. H. Hardin, <a href="/A278796/b278796.txt">Table of n, a(n) for n = 1..50</a>

%e Some solutions for n=1

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

%Y Cf. A278798.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 28 2016

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Last modified November 27 07:28 EST 2021. Contains 349365 sequences. (Running on oeis4.)