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A295212 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s. 1

%I #4 Nov 17 2017 07:25:33

%S 1,69,1162,27208,775547,18444470,444447937,10896495280,265837272259,

%T 6495847859424,158822121967384,3880909066698091,94831337129003187,

%U 2317336322758510242,56626572178295328836,1383738694001835856870

%N Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s.

%C Column 7 of A295213.

%H R. H. Hardin, <a href="/A295212/b295212.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A295213.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 17 2017

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