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A305456 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jun 01 2018 11:10:35

%S 0,702,9889,418382,16062787,612656116,23996865179,926180069711,

%T 35989846262523,1395378271164822,54135760975112693,

%U 2100037513280966131,81464733115621938829,3160246655805521489939,122592970503091781121979

%N Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A305457.

%H R. H. Hardin, <a href="/A305456/b305456.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305457.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 01 2018

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)