cp's OEIS Frontend

A183313 Number of n X n binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

%I A183313 #9 Jul 22 2025 08:48:33
%S A183313 2,6,43,480,11385,455509,35629548,4963103592,1301324910599,
%T A183313 621440459491278,550719742223029437,895987628972185952650,
%U A183313 2692063790042095644897446,14888067283069842424203964441
%N A183313 Number of n X n binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.
%C A183313 Diagonal of A183322
%H A183313 R. H. Hardin, <a href="/A183313/b183313.txt">Table of n, a(n) for n = 1..17</a>
%e A183313 Some solutions for 6X6
%e A183313 ..0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..0..0..0....0..0..0..0..0..0
%e A183313 ..0..1..1..0..0..0....0..0..0..1..1..0....1..1..0..0..0..0....0..0..0..0..0..0
%e A183313 ..0..1..1..1..1..1....1..1..0..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0
%e A183313 ..1..1..0..1..1..1....1..1..1..1..0..1....1..1..0..0..0..1....0..1..1..1..1..1
%e A183313 ..1..1..1..1..1..1....1..1..1..1..1..1....1..1..0..0..0..1....1..1..1..1..1..1
%e A183313 ..0..1..1..1..1..1....1..1..0..1..1..0....1..1..1..1..1..1....1..1..0..1..1..1
%K A183313 nonn
%O A183313 1,1
%A A183313 _R. H. Hardin_ Jan 03 2011