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Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.
1

%I #4 Nov 23 2016 15:12:05

%S 0,0,395,16224,354696,6208804,94510277,1235465691,13780447802,

%T 132510394588,1117003717258,8394295309778,57076381840494,

%U 355509912080514,2049367954200226,11026586497658309,55766838990035825,266680636061199341

%N Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

%C Column 2 of A278610.

%H R. H. Hardin, <a href="/A278605/b278605.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278605/a278605.txt">Empirical polynomial of degree 63</a>

%F Empirical polynomial of degree 63 (see link above)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A278610.

%K nonn

%O 1,3

%A _R. H. Hardin_, Nov 23 2016