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 A278431 Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake. 1

%I

%S 40,1609,57760,2116789,67971132,1796061464,39513263094,743248079740,

%T 12242795030458,179948822861856,2394561544941994,29174653111810701,

%U 328380943500399272,3439574456695348801,33729578625174035514

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

%C Column 3 of A278435.

%H R. H. Hardin, <a href="/A278431/b278431.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278431/a278431.txt">Empirical polynomial of degree 127</a>

%F Empirical polynomial of degree 127 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A278435.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 22 2016

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Last modified January 18 13:48 EST 2020. Contains 331009 sequences. (Running on oeis4.)