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 A233016 Number of nX6 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order 1

%I #4 Dec 03 2013 07:03:11

%S 122,25211,5249894,1093911305,227962456547,47506658438246,

%T 9900284810558324,2063199965393914025,429966921427300038587,

%U 89604286897966759599656,18673362774649874902634054

%N Number of nX6 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order

%C Column 6 of A233018

%H R. H. Hardin, <a href="/A233016/b233016.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 313*a(n-1) -25836*a(n-2) +915863*a(n-3) -16213670*a(n-4) +144756201*a(n-5) -517271096*a(n-6) -1142631169*a(n-7) +16130100519*a(n-8) -49834494904*a(n-9) +41222570902*a(n-10) +81411834252*a(n-11) -186980689770*a(n-12) +120589827444*a(n-13) -21008679048*a(n-14)

%e Some solutions for n=2

%e ..0..1..3..2..3..2....0..1..1..0..2..2....0..1..3..1..1..0....0..1..3..2..3..1

%e ..1..0..2..3..3..2....1..3..3..2..0..0....0..1..3..3..1..1....2..0..1..0..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 03 2013

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Last modified December 4 15:16 EST 2023. Contains 367563 sequences. (Running on oeis4.)