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 A246736 #6 Jun 02 2025 10:14:05 %S A246736 9368,47432,241544,1231304,6272072,31944440,162700376,828690200, %T A246736 4220813912,21498069128,109497066248,557706305672,2840590647176, %U A246736 14468108341688,73691067738968,375334033262552,1911705731599640 %N A246736 Number of length n+4 0..7 arrays with no pair in any consecutive five terms totalling exactly 7. %C A246736 Column 7 of A246737 %H A246736 R. H. Hardin, <a href="/A246736/b246736.txt">Table of n, a(n) for n = 1..210</a> %F A246736 Empirical: a(n) = 4*a(n-1) +4*a(n-2) +4*a(n-3) +18*a(n-4) +12*a(n-5) -4*a(n-7) -a(n-8) %e A246736 Some solutions for n=2 %e A246736 ..5....2....5....3....5....6....4....2....0....4....0....2....1....3....4....2 %e A246736 ..0....7....0....2....7....6....1....0....5....0....4....1....0....3....6....2 %e A246736 ..0....1....6....1....4....5....5....0....3....4....0....0....1....3....2....4 %e A246736 ..1....1....3....7....4....6....1....2....1....6....6....0....5....0....4....6 %e A246736 ..1....3....0....3....6....7....5....4....3....2....4....1....5....0....0....7 %e A246736 ..3....1....3....3....7....4....0....4....5....0....2....1....3....2....0....2 %K A246736 nonn %O A246736 1,1 %A A246736 _R. H. Hardin_, Sep 02 2014