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A207431 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.

%I A207431 #7 Jul 22 2025 20:25:45
%S A207431 31,961,11067,127449,2048823,32936121,474552171,6837470721,
%T A207431 102807481767,1545802349809,22864149458035,338186399124025,
%U A207431 5035128104126565,74966098845588129,1113208750837622133,16530588386278151641
%N A207431 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.
%C A207431 Row 7 of A207426
%H A207431 R. H. Hardin, <a href="/A207431/b207431.txt">Table of n, a(n) for n = 1..210</a>
%e A207431 Some solutions for n=4
%e A207431 ..1..1..0..0....0..0..1..1....1..0..1..1....1..0..1..1....0..1..1..1
%e A207431 ..0..0..1..1....0..1..1..1....0..1..1..0....1..1..0..1....1..1..0..1
%e A207431 ..0..1..1..1....0..1..1..0....1..1..0..0....1..1..0..1....1..1..1..0
%e A207431 ..0..1..1..0....0..0..1..1....1..1..0..0....1..0..0..1....0..1..1..0
%e A207431 ..0..1..1..1....0..0..1..1....1..1..0..0....1..0..0..1....0..1..1..0
%e A207431 ..0..0..1..1....0..0..1..1....1..1..0..0....1..0..0..1....0..1..1..0
%e A207431 ..0..1..1..0....0..0..1..1....1..1..0..0....1..0..0..1....0..1..1..0
%K A207431 nonn
%O A207431 1,1
%A A207431 _R. H. Hardin_ Feb 17 2012