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 A246477 #6 Dec 29 2023 21:18:57 %S A246477 966,4386,20004,91212,415650,1893780,8628792,39320988,179184654, %T A246477 816514170,3720653346,16954232310,77257406100,352048294158, %U A246477 1604217270528,7310107829838,33310766859666,151790888076216,691682436483000 %N A246477 Number of length n+3 0..6 arrays with no pair in any consecutive four terms totaling exactly 6. %C A246477 Column 6 of A246479. %H A246477 R. H. Hardin, <a href="/A246477/b246477.txt">Table of n, a(n) for n = 1..210</a> %F A246477 Empirical: a(n) = 3*a(n-1) +2*a(n-2) +3*a(n-3) +77*a(n-4) +55*a(n-5) +59*a(n-6) +18*a(n-7) +a(n-8) +4*a(n-9) +a(n-10). %e A246477 Some solutions for n=4 %e A246477 ..1....1....5....2....0....1....5....0....3....0....6....4....3....5....1....2 %e A246477 ..0....4....5....0....0....1....4....0....2....5....3....5....1....5....1....1 %e A246477 ..1....0....3....3....1....2....4....1....1....2....5....5....4....4....3....2 %e A246477 ..2....4....5....5....3....0....6....0....1....2....5....4....1....6....1....6 %e A246477 ..2....0....0....2....4....2....3....4....1....3....2....5....6....6....2....2 %e A246477 ..3....4....5....5....6....5....5....0....3....5....0....3....1....6....0....6 %e A246477 ..5....0....2....0....1....3....5....5....1....5....2....5....6....3....3....1 %Y A246477 Cf. A246479. %K A246477 nonn %O A246477 1,1 %A A246477 _R. H. Hardin_, Aug 27 2014