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 A222279 #6 Jul 23 2025 02:28:03 %S A222279 3125,20420505,133450391205,872117822449905,5699418948690910545, %T A222279 37246546285522069805565,243411692308741298296892325, %U A222279 1590731433240496702463084026185,10395665338455031917089762271340425 %N A222279 Number of nX6 0..5 arrays with no entry increasing mod 6 by 5 rightwards or downwards, starting with upper left zero. %C A222279 Column 6 of A222281 %H A222279 R. H. Hardin, <a href="/A222279/b222279.txt">Table of n, a(n) for n = 1..29</a> %F A222279 Empirical: a(n) = 7938*a(n-1) -9943008*a(n-2) +5278092573*a(n-3) -1416161397945*a(n-4) +189661760461122*a(n-5) -8951148305934130*a(n-6) -487109953871878605*a(n-7) +56895718084769745618*a(n-8) -830858693461616784042*a(n-9) -28335983890061186407242*a(n-10) +900964564966870530468786*a(n-11) -8459179431248677153169700*a(n-12) +25270987327038335804651100*a(n-13) %e A222279 Some solutions for n=2 %e A222279 ..0..0..0..0..1..3....0..0..0..2..2..2....0..0..0..1..1..3....0..0..0..2..5..1 %e A222279 ..3..0..0..0..1..1....3..0..0..3..3..3....3..0..0..3..3..4....2..0..3..5..2..5 %K A222279 nonn %O A222279 1,1 %A A222279 _R. H. Hardin_ Feb 14 2013