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A208712 Number of 5Xn 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

%I A208712 #7 Jul 22 2025 21:29:27
%S A208712 16,512,9604,204020,4226368,87985748,1830045552,38070302740,
%T A208712 791949216708,16474443378336,342707611610988,7129134738677660,
%U A208712 148302981848252912,3085055246536395480,64176496980568384684,1335023990202619369508
%N A208712 Number of 5Xn 0..1 arrays with new values 0..1 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 A208712 Row 5 of A208709
%H A208712 R. H. Hardin, <a href="/A208712/b208712.txt">Table of n, a(n) for n = 1..210</a>
%F A208712 Empirical: a(n) = 17*a(n-1) +95*a(n-2) -269*a(n-3) -1372*a(n-4) +1500*a(n-5) +6585*a(n-6) -5267*a(n-7) -11175*a(n-8) +10357*a(n-9) +1757*a(n-10) -3001*a(n-11) +237*a(n-12) +207*a(n-13) -30*a(n-14) for n>17
%e A208712 Some solutions for n=4
%e A208712 ..0..0..1..0....0..0..1..1....0..1..0..0....0..0..1..0....0..0..1..0
%e A208712 ..0..0..1..1....0..1..0..0....1..1..1..0....0..1..1..1....1..1..1..1
%e A208712 ..1..0..0..0....0..1..1..1....1..0..1..1....1..0..1..1....0..1..0..1
%e A208712 ..0..1..0..1....1..0..0..1....0..1..0..1....1..1..0..1....0..1..0..0
%e A208712 ..0..0..1..0....0..1..1..0....0..0..1..1....1..1..0..1....0..1..1..0
%K A208712 nonn
%O A208712 1,1
%A A208712 _R. H. Hardin_ Mar 01 2012