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A304766 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1

%I #4 May 18 2018 08:06:46

%S 0,702,22187,1999511,153265405,12219307955,969267512820,

%T 77018325396680,6119460744287122,486255500462536848,

%U 38638506180388225818,3070282856537314013825,243970256623096658549212

%N Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304767.

%H R. H. Hardin, <a href="/A304766/b304766.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304767.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 18 2018

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Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)