cp's OEIS Frontend

A249216 Number of length 4+6 0..n 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.

%I A249216 #5 Jul 23 2025 11:55:21
%S A249216 984,30876,658448,5630090,34695508,161678612,626273302,2049702248,
%T A249216 5979230646,15612736530,37868231726,85016420930,180991372636,
%U A249216 364878560018,706567478056,1308415445162
%N A249216 Number of length 4+6 0..n 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 A249216 Row 4 of A249212
%e A249216 Some solutions for n=2
%e A249216 ..0....2....1....2....2....1....0....0....0....0....2....0....1....2....2....1
%e A249216 ..2....0....0....0....1....2....2....2....1....0....0....2....0....0....0....0
%e A249216 ..1....2....0....0....2....2....2....2....1....2....2....2....0....1....2....2
%e A249216 ..0....2....1....2....2....0....1....1....0....1....2....2....2....2....1....1
%e A249216 ..0....2....0....1....1....1....1....1....0....0....2....2....0....2....1....2
%e A249216 ..0....1....0....2....2....2....2....2....1....0....2....2....1....0....2....2
%e A249216 ..1....2....2....1....1....2....0....2....0....1....1....1....0....1....0....1
%e A249216 ..2....1....1....2....2....1....0....1....2....1....0....1....0....2....2....0
%e A249216 ..1....2....0....0....1....1....0....0....1....1....2....1....2....2....1....1
%e A249216 ..1....2....1....2....2....1....0....1....0....0....1....1....1....0....1....1
%K A249216 nonn
%O A249216 1,1
%A A249216 _R. H. Hardin_, Oct 23 2014