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A298659 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 1

%I #4 Jan 24 2018 10:11:02

%S 8,95,63,322,876,2562,7964,24801,74358,242072,745571,2349275,7433849,

%T 23406485,73834463,233339001,735993576,2324359169,7339529089,

%U 23174991985,73178503209,231090268648,729735594047,2304427312579,7277098813048

%N Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298660.

%H R. H. Hardin, <a href="/A298659/b298659.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298660.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 24 2018

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Last modified April 23 02:53 EDT 2024. Contains 371906 sequences. (Running on oeis4.)