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A295211 Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s. 1

%I

%S 1,31,345,4938,85215,1245294,18444470,278238087,4170628296,

%T 62588525694,940255638767,14117945596996,211965773459470,

%U 3182555837979301,47783850148231569,717445698125438780,10772054909227440585

%N Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1s.

%C Column 6 of A295213.

%H R. H. Hardin, <a href="/A295211/b295211.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A295213.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 17 2017

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Last modified May 18 12:22 EDT 2022. Contains 353807 sequences. (Running on oeis4.)