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A207704 Number of 3Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically 4

%I

%S 6,36,102,289,1071,3969,13230,44100,153090,531441,1815939,6205081,

%T 21332924,73342096,251550372,862773129,2961885201,10168100569,

%U 34894442176,119749218304,411007092416,1410671672089,4841491994817

%N Number of 3Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically

%C Row 3 of A207703

%H R. H. Hardin, <a href="/A207704/b207704.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +10*a(n-3) +25*a(n-4) -2*a(n-5) +4*a(n-6) -28*a(n-7) -68*a(n-8) -2*a(n-9) +4*a(n-10) +10*a(n-11) +25*a(n-12) +2*a(n-13) -a(n-16)

%e Some solutions for n=4

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 19 2012

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Last modified October 26 08:00 EDT 2021. Contains 348267 sequences. (Running on oeis4.)