login

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”).

Number of length n+6 0..3 arrays with no seven consecutive terms having five times the sum of any two elements equal to two times the sum of the remaining five
2

%I #5 Oct 23 2014 08:39:26

%S 14336,51200,183516,658448,2363528,8486156,30475714,109474166,

%T 393232196,1412652056,5075187032,18233890510,65510631030,235369064306,

%U 845649181758,3038313571704,10916323664982,39221255161200,140918266479766

%N Number of length n+6 0..3 arrays with no seven consecutive terms having five times the sum of any two elements equal to two times the sum of the remaining five

%C Column 3 of A249212

%H R. H. Hardin, <a href="/A249207/b249207.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..0....0....2....2....0....2....0....2....2....2....2....2....0....2....0....2

%e ..2....3....3....2....2....2....1....0....2....0....0....2....0....2....3....3

%e ..2....1....0....2....2....2....2....2....2....1....2....3....0....0....2....0

%e ..3....0....2....2....0....3....0....3....3....2....3....2....2....3....2....1

%e ..1....2....0....0....2....0....1....3....0....2....2....2....1....0....1....0

%e ..1....0....2....3....2....1....1....1....2....3....0....0....0....1....0....2

%e ..1....0....3....0....0....2....3....1....1....0....0....1....3....0....2....3

%e ..2....0....0....1....2....0....3....3....1....0....2....0....3....0....1....2

%e ..2....2....3....2....2....3....2....2....3....1....0....1....2....3....3....2

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 23 2014