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A318067 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Aug 15 2018 13:12:38

%S 8,3437,156846,8929364,479322719,26085599617,1415459855958,

%T 76853282341918,4172233315256556,226510081564552681,

%U 12297129345031936573,667606422952950882889,36244085742172846775059,1967677047744653756690408

%N Number of nX7 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A318068.

%H R. H. Hardin, <a href="/A318067/b318067.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318068.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 15 2018

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Last modified August 6 14:16 EDT 2024. Contains 374974 sequences. (Running on oeis4.)