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A295651 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1, 3 or 4 1s. 1

%I #4 Nov 25 2017 08:38:36

%S 81,3082,135848,5812860,251412699,10849299317,468469936974,

%T 20225972157848,873281057421907,37704644127498308,1627934990177639858,

%U 70287640155962885204,3034736408508547801024,131027654478169006435181

%N Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1, 3 or 4 1s.

%C Column 7 of A295652.

%H R. H. Hardin, <a href="/A295651/b295651.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A295652.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 25 2017

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Last modified May 9 15:13 EDT 2024. Contains 372352 sequences. (Running on oeis4.)