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A318088 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Aug 16 2018 10:21:16

%S 1,5,7,159,493,1945,8525,37863,161424,688404,2927486,12630400,

%T 54054127,233057675,997644574,4291179236,18396315644,79062911556,

%U 339244535826,1457115193095,6254370569019,26856741255383,115296498702507

%N Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 5 of A318091.

%H R. H. Hardin, <a href="/A318088/b318088.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318091.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 16 2018

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Last modified April 25 16:42 EDT 2024. Contains 371989 sequences. (Running on oeis4.)