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A305021 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 1

%I #4 May 23 2018 16:15:24

%S 0,702,10487,570806,24498639,1125868355,51145342760,2330913035532,

%T 106184262061654,4838827075531557,220480153855823492,

%U 10046790366410275173,457802551646014275739,20860807824396398424481

%N Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A305022.

%H R. H. Hardin, <a href="/A305021/b305021.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305022.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 23 2018

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)