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A295203 Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s. 1

%I #4 Nov 16 2017 21:58:18

%S 1,9,53,284,1597,8241,40924,205338,1042704,5314555,27092309,138002993,

%T 702445256,3574586491,18191250083,92585186127,471238018339,

%U 2398510082832,12207851011336,62134641610255,316247636411785,1609610934773928

%N Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.

%C Column 6 of A295205.

%H R. H. Hardin, <a href="/A295203/b295203.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A295203/a295203.txt">Empirical recurrence of order 85</a>

%F Empirical recurrence of order 85 (see link above)

%e Some solutions for n=7

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

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

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

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

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

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

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

%Y Cf. A295205.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 16 2017

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)