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A297543 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s. 1

%I #4 Dec 31 2017 15:03:11

%S 1,381,4617,65363,2748026,67372651,1610981344,45496070039,

%T 1204223924807,31395434922611,839621841413395,22297914534222936,

%U 589873752024831225,15663501392099069812,415682851416335706284,11022783242886075047889

%N Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.

%C Column 7 of A297544.

%H R. H. Hardin, <a href="/A297543/b297543.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..0..0..1..1..1..0. .0..0..0..0..1..0..0

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

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

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

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

%Y Cf. A297544.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 31 2017

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)