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A295119 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1s. 1

%I #4 Nov 15 2017 06:21:01

%S 13,178,1960,24347,295083,3590821,43655680,530696748,6452840307,

%T 78464174127,953998068679,11599362088138,141035410432226,

%U 1714816891986887,20850061397844599,253511401875888073

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

%C Column 7 of A295120.

%H R. H. Hardin, <a href="/A295119/b295119.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A295120.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 15 2017

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Last modified April 18 14:58 EDT 2024. Contains 371780 sequences. (Running on oeis4.)