A278549 - OEIS

%I #4 Nov 23 2016 07:55:55

%S 4,1531,124564,6207774,256173362,9647190761,327443433750,

%T 9777854836324,255595250091256,5894080544358413,121339401663068582,

%U 2256920347962876651,38335567041339845608,600100691863091778854,8724164918493189698726

%N Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

%C Column 3 of A278553.

%H R. H. Hardin, <a href="/A278549/b278549.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278549/a278549.txt">Empirical polynomial of degree 191</a>

%F Empirical polynomial of degree 191 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A278553.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 23 2016