|
%I #5 Mar 31 2012 12:36:57
%S 2,44,728,10016,129656,1649668,20742920,256903112,3151779352,
%T 38451720324,466959465212,5648183965356,68109502172416,
%U 819331697005244,9836181686366944,117879822160978616,1410647793481255432
%N Number of nX4 0,1 arrays with adjacent row and column sums unequal
%C Column 4 of A203610
%H R. H. Hardin, <a href="/A203606/b203606.txt">Table of n, a(n) for n = 1..39</a>
%e Some solutions for 4X4
%e ..0..0..1..1....0..1..1..0....1..1..0..0....1..1..0..1....1..0..0..1
%e ..0..0..0..1....0..0..1..0....1..0..1..1....0..0..1..0....0..0..1..0
%e ..0..0..0..0....1..1..1..0....0..0..1..0....0..1..1..1....1..1..0..1
%e ..1..0..0..0....1..1..1..1....1..1..1..1....0..1..0..1....1..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 03 2012
| 