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 A264268 #6 Nov 10 2015 11:30:52 %S A264268 65,1280,40626,1143000,33729146,981994496,28735927165,839596650695, %T A264268 24544787527541,717416324352000,20970567317759053,612971699603292777, %U A264268 17917345209329491525,523728155369756381184,15308707141186512270826 %N A264268 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 1,0 or 1,2. %C A264268 Column 4 of A264272. %H A264268 R. H. Hardin, <a href="/A264268/b264268.txt">Table of n, a(n) for n = 1..210</a> %H A264268 R. H. Hardin, <a href="/A264268/a264268.txt">Empirical recurrence of order 52</a> %F A264268 Empirical recurrence of order 52 (see link above) %e A264268 Some solutions for n=3 %e A264268 ..5..6..9..3..4....0..1..9..3..4....5..1..2..3..4....7..8..2..3..4 %e A264268 ..0..1.12..8..2...12.11.14..8..2....0.11.14..8..9....0..1.12.13..9 %e A264268 .10.18..7.13.14...15..6..5.13..7...15.18..7..6.19...17..6..5.18.19 %e A264268 .15.16.17.11.19...10.16.17.18.19...10.16.17.13.12...15.16.10.11.14 %Y A264268 Cf. A264272. %K A264268 nonn %O A264268 1,1 %A A264268 _R. H. Hardin_, Nov 10 2015