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A305287 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 May 29 2018 08:23:40

%S 8,4184,13289,246893,1847322,21092843,214220078,2256259549,

%T 24509450800,259901782836,2843507124392,30631168228754,

%U 334342089367106,3634031836968663,39621260318244162,432105418816370549

%N Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A305288.

%H R. H. Hardin, <a href="/A305287/b305287.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305288.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 29 2018

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Last modified July 22 02:38 EDT 2024. Contains 374479 sequences. (Running on oeis4.)