cp's OEIS Frontend

A207583 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically.

%I A207583 #9 Jul 22 2025 20:36:55
%S A207583 2,16,60,432,3094,25776,263550,3832616,69396520,1475600124,
%T A207583 38962584092,1441585611138,67002761499928,3878723937334928,
%U A207583 264400592646069420,24784751879627310504,3083505379073129163384,470186218198870776234068
%N A207583 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically.
%C A207583 Diagonal of A207589
%H A207583 R. H. Hardin, <a href="/A207583/b207583.txt">Table of n, a(n) for n = 1..25</a>
%e A207583 Some solutions for n=4
%e A207583 ..0..1..1..0....1..1..0..0....0..1..1..0....1..1..1..1....1..0..1..0
%e A207583 ..1..0..1..1....1..0..1..0....1..0..1..0....1..0..1..1....1..1..0..1
%e A207583 ..0..1..0..0....0..1..0..0....1..1..0..0....0..1..0..0....0..1..1..0
%e A207583 ..1..0..1..0....1..1..1..0....0..1..1..0....0..1..1..0....1..0..1..1
%K A207583 nonn
%O A207583 1,1
%A A207583 _R. H. Hardin_ Feb 19 2012