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.
%I A249534 #6 Jul 23 2025 12:04:28 %S A249534 472,10834,147984,1161050,6143828,25889916,89105036,265355962, %T A249534 703196860,1697573454,3791220900,7939541008,15724825316,29686208288, %U A249534 53758774120,93865133098,158683717456,260719421940,417432211296,652964625866 %N A249534 Number of length 4+5 0..n arrays with no six consecutive terms having five times any element equal to the sum of the remaining five. %C A249534 Row 4 of A249530 %H A249534 R. H. Hardin, <a href="/A249534/b249534.txt">Table of n, a(n) for n = 1..29</a> %e A249534 Some solutions for n=3 %e A249534 ..1....2....0....0....0....2....2....0....2....1....0....1....0....1....2....2 %e A249534 ..2....3....1....2....0....1....2....2....2....2....0....2....0....2....0....2 %e A249534 ..0....0....0....1....0....3....1....2....1....0....1....1....1....3....3....3 %e A249534 ..0....1....3....3....0....2....3....2....1....2....0....1....1....0....2....2 %e A249534 ..0....2....3....0....1....2....2....0....1....0....1....3....1....1....2....2 %e A249534 ..2....2....3....3....1....3....3....1....2....0....1....2....1....0....2....0 %e A249534 ..2....3....0....0....3....0....2....1....2....0....1....1....3....2....1....1 %e A249534 ..3....0....2....3....2....1....0....3....2....3....3....0....1....3....1....2 %e A249534 ..3....2....3....2....1....3....1....1....0....3....2....1....1....1....3....3 %K A249534 nonn %O A249534 1,1 %A A249534 _R. H. Hardin_, Oct 31 2014