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Number of nX5 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.
1

%I #4 Nov 19 2016 12:00:09

%S 20,281,3183,34038,366982,4058169,44208465,451571539,4213513472,

%T 35702217342,275765596545,1955472740426,12826024056862,78357459733281,

%U 448627173302773,2420105832394544,12358148308045511,59981333718872012

%N Number of nX5 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

%C Column 5 of A278363.

%H R. H. Hardin, <a href="/A278360/b278360.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A278360/a278360.txt">Empirical polynomial of degree 63</a>

%F Empirical polynomial of degree 63 (see link above)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A278363.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2016