A278305 - OEIS

%I #4 Nov 17 2016 07:04:56

%S 51,2089,70795,2360544,79562696,2506281752,69684770828,1689884963173,

%T 36045826631067,685286426542689,11759467817079518,184109136699624075,

%U 2653459164462630395,35466423366457631706,442375217765486649151

%N Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

%C Column 4 of A278309.

%H R. H. Hardin, <a href="/A278305/b278305.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278305/a278305.txt">Empirical polynomial of degree 161</a>

%F Empirical polynomial of degree 161 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A278309.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 17 2016