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 A208838 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically 2

%I #5 Mar 31 2012 12:37:25

%S 26,676,2430,9801,49126,272206,1644265,10399480,67895010,451450105,

%T 3037317426,20579585922,140057351785,955762122172,6533166024022,

%U 44704031815465,306089086744206,2096624267502790,14364797790087081

%N Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically

%C Column 6 of A208840

%H R. H. Hardin, <a href="/A208838/b208838.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 11*a(n-1) -17*a(n-2) -124*a(n-3) +276*a(n-4) +396*a(n-5) -902*a(n-6) -462*a(n-7) +946*a(n-8) +220*a(n-9) -340*a(n-10) -44*a(n-11) +39*a(n-12) +3*a(n-13) -a(n-14) for n>15

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 01 2012

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Last modified September 17 20:43 EDT 2024. Contains 375990 sequences. (Running on oeis4.)