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A317610 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Aug 01 2018 13:46:26

%S 64,752,4708,64593,1160029,17100005,271661553,4668181991,80648172452,

%T 1396559252995,24643342111164,438424811068310,7799061411116940,

%U 139398646047700432,2497946121406633004,44761291598862514738

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A317611.

%H R. H. Hardin, <a href="/A317610/b317610.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317611.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 01 2018

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Last modified May 4 07:16 EDT 2024. Contains 372230 sequences. (Running on oeis4.)