cp's OEIS Frontend

A249289 Number of length n+3 0..7 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.

%I A249289 #6 Jul 23 2025 11:58:06
%S A249289 3584,25280,178644,1263044,8930228,63142432,446465388,3156873140,
%T A249289 22321652802,157832259724,1116002868810,7891051581722,55796177670214,
%U A249289 394524535750878,2789610622867354,19724825025520940,139470619655277052
%N A249289 Number of length n+3 0..7 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
%C A249289 Column 7 of A249290
%H A249289 R. H. Hardin, <a href="/A249289/b249289.txt">Table of n, a(n) for n = 1..210</a>
%e A249289 Some solutions for n=3
%e A249289 ..2....6....5....2....4....0....4....0....0....4....6....0....0....2....2....2
%e A249289 ..6....7....6....1....5....5....0....5....2....6....3....3....5....2....6....3
%e A249289 ..6....5....2....4....4....2....6....1....4....3....1....0....6....7....3....0
%e A249289 ..6....7....6....0....2....0....7....4....5....1....4....7....5....7....0....6
%e A249289 ..5....6....5....7....3....4....7....3....6....7....3....3....6....5....7....5
%e A249289 ..5....7....2....3....5....3....0....1....3....7....0....1....0....5....4....0
%K A249289 nonn
%O A249289 1,1
%A A249289 _R. H. Hardin_, Oct 24 2014