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A300424 Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Mar 05 2018 14:38:46

%S 3,96,1390,18205,240196,3175101,41940055,553858752,7314644478,

%T 96601163193,1275761565009,16848387433285,222508616223701,

%U 2938565229183137,38808230767812986,512521810773712332

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

%C Column 5 of A300427.

%H R. H. Hardin, <a href="/A300424/b300424.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300427.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 05 2018

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Last modified April 23 07:57 EDT 2024. Contains 371905 sequences. (Running on oeis4.)