A278850 - OEIS

%I #4 Nov 29 2016 10:24:20

%S 0,1,66,1348,15066,118158,731444,3813048,17413532,71497004,268726051,

%T 936836634,3059698312,9435007950,27642602449,77344108820,207567987387,

%U 536252189264,1337891704776,3232242731921,7579822554305,17290405684287

%N Number of nX3 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

%C Column 3 of A278855.

%H R. H. Hardin, <a href="/A278850/b278850.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278850/a278850.txt">Empirical polynomial of degree 27</a>

%F Empirical polynomial of degree 27 (see link above)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A278855.

%K nonn

%O 1,3

%A _R. H. Hardin_, Nov 29 2016