%I #4 Nov 27 2016 07:13:40
%S 40,1947,58904,1410818,28637916,506031118,7907770636,110655824716,
%T 1401584381570,16222274394016,173007912264684,1712497545142699,
%U 15831976807688826,137451501603516285,1125976516897709842
%N Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
%C Column 3 of A278734.
%H R. H. Hardin, <a href="/A278729/b278729.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A278729/a278729_1.txt">Empirical polynomial of degree 109</a>
%F Empirical polynomial of degree 109 (see link above)
%e Some solutions for n=3
%e ..2..2..1. .0..0..0. .1..0..0. .0..3..1. .3..1..1. .3..1..0. .2..0..0
%e ..1..1..3. .1..2..1. .0..3..1. .0..3..1. .3..3..1. .0..0..0. .3..1..1
%e ..2..2..2. .2..2..1. .1..1..3. .1..0..1. .2..0..0. .1..3..2. .1..2..0
%Y Cf. A278734.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 27 2016