Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Oct 23 2014 10:41:11
%S 292,15552,482388,5479172,40881292,240606388,1127486210,4315376562,
%T 15153436332,46471655246,129454999590,336738094070,813733089556,
%U 1842347899634,3989704900336,8210723053024,16191974934630,30859425433708
%N Number of length 6+5 0..n arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four
%C Row 6 of A249233
%H R. H. Hardin, <a href="/A249239/b249239.txt">Table of n, a(n) for n = 1..28</a>
%e Some solutions for n=2
%e ..0....0....2....1....2....0....1....1....0....2....2....0....2....0....1....2
%e ..1....2....2....2....2....1....1....0....0....2....0....1....2....2....2....1
%e ..1....1....0....1....0....0....1....1....2....0....0....2....1....1....1....1
%e ..0....0....2....1....1....1....0....0....1....0....2....0....0....0....2....1
%e ..2....1....0....2....0....1....2....2....1....2....0....2....1....0....0....1
%e ..1....1....1....0....2....2....2....1....1....1....1....2....1....2....2....1
%e ..0....2....2....1....2....2....1....0....0....0....1....0....2....0....0....0
%e ..0....0....0....2....0....1....2....0....2....2....1....1....2....2....2....0
%e ..1....1....0....2....0....0....0....1....0....0....0....0....2....0....1....1
%e ..1....0....2....0....1....2....0....1....0....2....1....2....2....0....0....2
%e ..1....0....2....2....0....1....2....1....2....0....0....2....1....1....0....0
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 23 2014