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A297725 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s. 1

%I #4 Jan 04 2018 22:02:52

%S 1,876,21116,268630,6812856,183324631,4021047904,89397422003,

%T 2107800484124,48991993784653,1122852568198335,25900643054077073,

%U 599236232228096280,13831438744530944473,319108863737459622613

%N Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.

%C Row 6 of A297720.

%H R. H. Hardin, <a href="/A297725/b297725.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

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

%Y Cf. A297720.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 04 2018

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)