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A317813 Number of nX6 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Aug 07 2018 21:58:53

%S 1,10,8,56,94,142,434,1071,2279,6087,15953,40210,104488,270430,701710,

%T 1825318,4749330,12368352,32279336,84388645,220794188,577879166,

%U 1513375097,3965597997,10397097617,27277536409,71596450975,187986384248

%N Number of nX6 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 6 of A317815.

%H R. H. Hardin, <a href="/A317813/b317813.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317815.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 07 2018

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Last modified August 13 22:54 EDT 2024. Contains 375146 sequences. (Running on oeis4.)