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 A229011 #8 Sep 13 2013 20:09:16 %S A229011 8,62,470,2666,13040,60180,273124,1248872,5780144,26993340,126638342, %T A229011 594901860,2793932346,13112533536,61505348386,288407464930, %U A229011 1352248997558,6340299132898,29728967922162,139400729229576,653670375108782 %N A229011 Number of arrays of median of three adjacent elements of some length n+2 0..7 array, with no adjacent equal elements in the latter. %C A229011 Column 7 of A229012. %H A229011 R. H. Hardin, <a href="/A229011/b229011.txt">Table of n, a(n) for n = 1..127</a> %e A229011 Some solutions for n=4 %e A229011 ..0....4....2....1....3....3....6....2....3....2....1....5....6....0....6....1 %e A229011 ..3....2....5....4....7....3....6....4....5....6....3....5....5....3....7....1 %e A229011 ..2....2....3....0....0....1....7....1....5....0....1....4....6....0....2....7 %e A229011 ..4....5....7....1....7....4....0....4....6....1....6....4....6....5....2....5 %K A229011 nonn %O A229011 1,1 %A A229011 _R. H. Hardin_, Sep 10 2013