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A298885 Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jan 28 2018 08:45:44

%S 3,23,23,73,123,243,444,897,1801,3462,6669,13291,25762,49483,97860,

%T 193033,376031,735990,1440269,2815283,5522803,10827092,21196028,

%U 41505035,81298779,159266998,311969014,611140770,1197086348,2345047342,4593936013

%N Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Column 5 of A298888.

%H R. H. Hardin, <a href="/A298885/b298885.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=7

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

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

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

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

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

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

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

%Y Cf. A298888.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 28 2018

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Last modified April 25 12:53 EDT 2024. Contains 371969 sequences. (Running on oeis4.)