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 A249462 #6 Jan 27 2022 22:36:28 %S A249462 2640,11260,48180,206428,884728,3791504,16249428,69646680,298527530, %T A249462 1279613894,5484967770,23510991158,100778855292,431985293958, %U A249462 1851693204500,7937234390598,34022755120144,145837709303458 %N A249462 Number of length n+4 0..4 arrays with no five consecutive terms having four times any element equal to the sum of the remaining four. %C A249462 Column 4 of A249466. %H A249462 R. H. Hardin, <a href="/A249462/b249462.txt">Table of n, a(n) for n = 1..210</a> %e A249462 Some solutions for n=3 %e A249462 ..2....2....3....3....2....3....4....1....4....2....4....2....1....0....0....4 %e A249462 ..3....0....4....0....1....4....1....0....3....1....4....3....4....4....4....0 %e A249462 ..1....4....3....4....1....2....0....4....1....4....1....3....2....2....2....1 %e A249462 ..4....1....3....3....4....1....2....4....2....2....0....1....0....2....0....1 %e A249462 ..1....4....3....2....0....1....4....3....4....2....4....4....0....4....2....4 %e A249462 ..1....0....3....0....4....3....4....3....3....3....2....2....1....4....0....2 %e A249462 ..2....1....2....4....1....1....2....0....1....3....4....2....0....4....0....1 %Y A249462 Cf. A249466. %K A249462 nonn %O A249462 1,1 %A A249462 _R. H. Hardin_, Oct 29 2014