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 A207950 Number of 4Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically 1

%I

%S 10,100,370,1369,3478,8836,18330,38025,69420,126736,211820,354025,

%T 554540,868624,1294548,1929321,2764110,3960100,5494390,7623121,

%U 10298530,13912900,18377710,24275329,31453968,40755456,51933840,66178225,83107160

%N Number of 4Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically

%C Row 4 of A207949

%H R. H. Hardin, <a href="/A207950/b207950.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +6*a(n-2) -14*a(n-3) -14*a(n-4) +42*a(n-5) +14*a(n-6) -70*a(n-7) +70*a(n-9) -14*a(n-10) -42*a(n-11) +14*a(n-12) +14*a(n-13) -6*a(n-14) -2*a(n-15) +a(n-16)

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012

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Last modified December 6 00:51 EST 2021. Contains 349558 sequences. (Running on oeis4.)