cp's OEIS Frontend

A233159 Number of 6Xn 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally.

%I A233159 #6 Jul 23 2025 07:55:34
%S A233159 729,6144,93312,1417176,22692312,367125912,5986203912,97881138720,
%T A233159 1602873102744,26263615856184,430448561176896,7055528832767376,
%U A233159 115652113962870744,1895759819221508496,31075287281252187264
%N A233159 Number of 6Xn 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally.
%C A233159 Row 6 of A233155
%H A233159 R. H. Hardin, <a href="/A233159/b233159.txt">Table of n, a(n) for n = 1..210</a>
%F A233159 Empirical: a(n) = 30*a(n-1) -283*a(n-2) +1038*a(n-3) -573*a(n-4) -6705*a(n-5) +21056*a(n-6) -27636*a(n-7) +17216*a(n-8) -4128*a(n-9) for n>15
%e A233159 Some solutions for n=3
%e A233159 ..0..1..0....2..1..2....2..2..2....0..1..2....0..0..0....2..2..2....0..0..1
%e A233159 ..2..1..0....2..2..2....2..2..1....2..2..1....1..0..0....1..2..2....1..2..1
%e A233159 ..0..1..0....1..2..2....2..2..2....1..0..0....1..0..1....2..2..2....2..2..1
%e A233159 ..0..1..0....1..2..2....2..1..2....0..1..0....1..0..1....2..1..2....1..0..0
%e A233159 ..0..0..1....2..1..2....2..2..2....0..1..2....1..2..2....2..2..1....0..0..1
%e A233159 ..0..0..0....0..1..0....1..2..2....0..1..2....2..2..1....2..2..2....0..0..1
%K A233159 nonn
%O A233159 1,1
%A A233159 _R. H. Hardin_, Dec 05 2013