cp's OEIS Frontend

A202739 Number of n X 5 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

%I A202739 #7 Jul 16 2025 11:53:31
%S A202739 2,54,638,6870,75302,827502,8870150,93402390,969837470,10133577294,
%T A202739 104168885570,1073411553030,11008021249370,112437630047286,
%U A202739 1151811769082618,11687452535796630,118872499759443950
%N A202739 Number of n X 5 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
%C A202739 Column 5 of A202742.
%H A202739 R. H. Hardin, <a href="/A202739/b202739.txt">Table of n, a(n) for n = 1..31</a>
%e A202739 Some solutions for n=5
%e A202739 ..0..1..1..0..0....0..1..0..0..1....1..0..0..0..1....0..1..1..1..0
%e A202739 ..0..1..0..1..0....1..1..0..0..0....0..0..0..1..1....0..1..1..1..0
%e A202739 ..0..1..0..1..0....0..0..0..1..1....0..1..0..1..0....0..1..0..1..1
%e A202739 ..0..0..0..1..1....0..0..1..1..0....1..0..1..0..0....1..0..0..1..1
%e A202739 ..1..0..1..0..0....0..1..0..0..1....0..0..1..1..0....1..1..1..0..0
%Y A202739 Cf. A202742.
%K A202739 nonn
%O A202739 1,1
%A A202739 _R. H. Hardin_, Dec 23 2011