A278411 - OEIS

%I #4 Nov 21 2016 09:08:47

%S 90,22267,3576730,514122657,62922179364,6584300364020,615691843257769,

%T 53477639726024161,4387410446730955493,339567886171232998387,

%U 24599607739826174384488,1657477158622895134648601

%N Number of nX5 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

%C Column 5 of A278414.

%H R. H. Hardin, <a href="/A278411/b278411.txt">Table of n, a(n) for n = 1..99</a>

%e Some solutions for n=2

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

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

%Y Cf. A278414.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 21 2016