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 A247538 #8 Jul 23 2025 11:36:13 %S A247538 8,153,1018,3455,8440,16683,29012,47061,70374,101211,139098,186709, %T A247538 242550,310309,387886,479071,581190,700039,831330,980163,1143696, %U A247538 1326791,1525156,1747277,1985126,2246569,2527836,2835111,3161492,3517493,3893824 %N A247538 Number of length 6+3 0..n arrays with some disjoint pairs in every consecutive four terms having the same sum. %C A247538 Row 6 of A247533 %H A247538 R. H. Hardin, <a href="/A247538/b247538.txt">Table of n, a(n) for n = 1..210</a> %H A247538 R. H. Hardin, <a href="/A247538/a247538.txt">Empirical recurrence of order 92</a> %F A247538 Empirical recurrence of order 92 (see link above) %e A247538 Some solutions for n=6 %e A247538 ..4....2....6....2....1....4....5....0....5....6....0....1....6....4....2....4 %e A247538 ..1....6....5....6....3....3....4....1....4....5....2....0....3....4....5....3 %e A247538 ..5....0....1....4....2....1....3....3....0....2....3....1....2....5....4....4 %e A247538 ..2....4....2....4....4....2....2....2....1....1....5....2....5....3....3....5 %e A247538 ..4....2....4....2....5....0....3....0....5....4....6....3....4....6....4....4 %e A247538 ..3....2....5....2....3....1....4....1....4....5....4....4....3....4....5....5 %e A247538 ..5....4....3....0....2....1....5....3....0....2....5....5....4....1....2....6 %e A247538 ..6....0....2....4....4....2....2....2....1....1....3....6....5....3....3....3 %e A247538 ..4....2....0....6....3....0....1....0....5....4....4....3....6....6....4....2 %K A247538 nonn %O A247538 1,1 %A A247538 _R. H. Hardin_, Sep 18 2014