cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A249191 Number of length n+6 0..2 arrays with no seven consecutive terms having four times the sum of any three elements equal to three times the sum of the remaining four.

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%I A249191 #6 Jul 23 2025 11:52:43
%S A249191 1792,4586,11874,30876,80354,208876,541624,1400008,3618986,9363890,
%T A249191 24245852,62802512,162682626,421350312,1091065338,2824952300,
%U A249191 7314373948,18939413676,49042889408,126997380012,328860987784,851576753420
%N A249191 Number of length n+6 0..2 arrays with no seven consecutive terms having four times the sum of any three elements equal to three times the sum of the remaining four.
%C A249191 Column 2 of A249197
%H A249191 R. H. Hardin, <a href="/A249191/b249191.txt">Table of n, a(n) for n = 1..210</a>
%e A249191 Some solutions for n=5
%e A249191 ..0....0....1....2....1....2....2....2....2....1....2....1....2....2....0....0
%e A249191 ..0....0....0....1....2....1....1....2....0....1....0....0....0....0....2....1
%e A249191 ..1....1....1....0....2....1....2....1....2....1....2....1....2....0....0....2
%e A249191 ..1....1....2....2....1....2....2....1....0....0....1....1....2....0....0....2
%e A249191 ..0....2....2....2....2....1....0....0....2....2....1....0....0....0....2....1
%e A249191 ..0....0....2....2....2....2....1....1....1....2....2....1....0....2....2....0
%e A249191 ..1....1....0....2....0....1....0....2....1....2....2....1....2....1....2....2
%e A249191 ..1....1....2....1....1....2....0....2....2....1....2....0....2....1....0....1
%e A249191 ..2....2....1....1....0....0....1....2....0....0....2....1....2....1....2....1
%e A249191 ..0....2....1....0....2....2....1....2....2....2....0....0....2....1....0....2
%e A249191 ..1....2....1....0....2....2....0....0....2....1....1....0....2....2....2....2
%K A249191 nonn
%O A249191 1,1
%A A249191 _R. H. Hardin_, Oct 23 2014