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A278629 Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1

%I

%S 1,285,10824,234484,3739008,48592635,541463431,5325263364,47098291840,

%T 379621129293,2817194942225,19407777240447,124964309624036,

%U 756392815286668,4325156175914066,23464134450391209,121221027131246039

%N Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

%C Column 3 of A278634.

%H R. H. Hardin, <a href="/A278629/b278629.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278629/a278629.txt">Empirical polynomial of degree 70</a>

%F Empirical polynomial of degree 70 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A278634.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 24 2016

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Last modified January 26 14:20 EST 2022. Contains 350598 sequences. (Running on oeis4.)