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A208395 Number of 4Xn 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1

%I

%S 14,1094,79092,5800644,424785708,31112194860,2278687944204,

%T 166893600277548,12223468411103052,895260103173464940,

%U 65569822288888377996,4802404999579303113900,351733358040572021645772

%N Number of 4Xn 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

%C Row 4 of A208392

%H R. H. Hardin, <a href="/A208395/b208395.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 61*a(n-1) +868*a(n-2) +2200*a(n-3) -7744*a(n-4) -17728*a(n-5) +40704*a(n-6) -13824*a(n-7) for n>9

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 25 2012

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Last modified August 12 04:46 EDT 2022. Contains 356067 sequences. (Running on oeis4.)