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A305171 Number of nX4 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 2

%I #4 May 26 2018 18:15:04

%S 0,18,46,410,2397,13970,93426,586718,3677924,23496484,148684241,

%T 941163254,5971654744,37839850436,239798822661,1520098487556,

%U 9634266216810,61062460761584,387030710270010,2453048690073328

%N Number of nX4 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 4 of A305175.

%H R. H. Hardin, <a href="/A305171/b305171.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A305171/a305171.txt">Empirical recurrence of order 66</a>

%F Empirical recurrence of order 66 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305175.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 26 2018

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Last modified April 24 08:21 EDT 2024. Contains 371926 sequences. (Running on oeis4.)