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A207900 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

%I A207900 #7 Jul 22 2025 20:57:36
%S A207900 42,1764,8928,47320,231900,1153532,5888458,29719004,148308700,
%T A207900 747498440,3783114924,19018273952,95539877180,481930389188,
%U A207900 2429549328924,12220600155324,61525298964898,310087031694592,1561597935502608
%N A207900 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.
%C A207900 Row 7 of A207895
%H A207900 R. H. Hardin, <a href="/A207900/b207900.txt">Table of n, a(n) for n = 1..210</a>
%e A207900 Some solutions for n=4
%e A207900 ..1..1..0..0....1..0..0..1....0..0..1..1....1..1..1..1....1..1..0..0
%e A207900 ..1..1..1..0....1..1..0..0....0..0..1..1....0..1..0..0....1..1..0..0
%e A207900 ..0..0..1..1....0..1..1..1....1..1..0..0....0..0..1..0....0..0..1..1
%e A207900 ..0..1..0..0....1..0..0..1....0..1..1..1....1..1..1..1....1..0..0..1
%e A207900 ..1..0..0..1....0..0..1..0....0..0..1..0....1..0..0..1....0..1..1..0
%e A207900 ..1..1..1..0....1..1..0..0....1..0..0..1....0..0..1..0....0..1..0..0
%e A207900 ..0..1..1..1....0..1..1..1....0..1..1..1....0..1..0..0....1..0..0..1
%K A207900 nonn
%O A207900 1,1
%A A207900 _R. H. Hardin_ Feb 21 2012