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A317603 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Aug 01 2018 13:38:57

%S 64,1709,40080,994993,25248997,679103465,18167894481,485582717996,

%T 13027760526423,349547081066847,9374634814121793,251466646898614740,

%U 6745900361432771158,180960374468629585921,4854296041561377706389

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A317604.

%H R. H. Hardin, <a href="/A317603/b317603.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317604.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 01 2018

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)