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 A297523 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s. 1

%I #4 Dec 31 2017 09:57:52

%S 1,55,727,3383,19187,193087,1671315,11283382,81257447,657369214,

%T 5147569469,38210138908,288167354609,2227166744932,17081986727547,

%U 129544373848971,986096515060524,7545134870681164,57628191903916501

%N Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.

%C Row 5 of A297519.

%H R. H. Hardin, <a href="/A297523/b297523.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A297523/a297523.txt">Empirical recurrence of order 87</a>

%F Empirical recurrence of order 87 (see link above)

%e Some solutions for n=6

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

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

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

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

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

%Y Cf. A297519.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 31 2017

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Last modified May 28 21:57 EDT 2023. Contains 363028 sequences. (Running on oeis4.)