cp's OEIS Frontend

A249004 Number of length 3+4 0..n arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two.

%I A249004 #6 Jul 23 2025 11:49:49
%S A249004 112,1140,8680,42308,163112,485580,1298968,2997774,6449496,12811158,
%T A249004 24159584,42911184,73629888,120844328,193152322,298869080,452268778,
%U A249004 666984964,966771826,1372738118,1920965096,2643444158,3592832436
%N A249004 Number of length 3+4 0..n arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two.
%C A249004 Row 3 of A249001
%H A249004 R. H. Hardin, <a href="/A249004/b249004.txt">Table of n, a(n) for n = 1..69</a>
%e A249004 Some solutions for n=5
%e A249004 ..1....4....4....0....3....3....1....4....1....0....4....1....0....1....1....3
%e A249004 ..1....4....1....0....5....3....0....0....4....4....3....1....2....5....1....2
%e A249004 ..2....5....2....2....1....1....0....3....0....2....0....5....2....3....1....0
%e A249004 ..0....2....4....4....1....3....0....3....2....1....2....2....0....3....4....3
%e A249004 ..0....1....1....5....4....3....0....3....5....5....0....0....5....5....2....3
%e A249004 ..5....0....5....5....3....1....5....5....3....5....3....5....3....3....5....1
%e A249004 ..1....1....4....0....2....1....4....3....5....4....4....1....2....4....2....1
%K A249004 nonn
%O A249004 1,1
%A A249004 _R. H. Hardin_, Oct 18 2014