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

%I #4 May 19 2018 12:25:09

%S 64,432,1009,4816,45988,294924,1500288,10862979,74522808,445537503,

%T 2890316757,19411788281,123321843070,789295662382,5175412707808,

%U 33457355130603,215064539707167,1395577141904583,9044156823266796

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

%C Column 7 of A304848.

%H R. H. Hardin, <a href="/A304847/b304847.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304848.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 19 2018