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 A264171 #6 Nov 10 2015 11:46:28 %S A264171 69,8007,408698,23916656,1432853288,83609564805,4868342507373, %T A264171 283367589816531,16469467179397573,956260182816301823, %U A264171 55484547617668226346,3218321886243655288008,186643918339019352805709 %N A264171 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,0 0,1 1,0 -2,-1 or -1,-2. %C A264171 Column 6 of A264172. %H A264171 R. H. Hardin, <a href="/A264171/b264171.txt">Table of n, a(n) for n = 1..27</a> %e A264171 Some solutions for n=2 %e A264171 .15.10.11..2..3.20..6....0..1..2..3..4.20..5...15..0..1.18..4..5..6 %e A264171 ..0..1..8..9..4..5.13...16..7..9.10.11.12..6...16..7..2..3.20.11.13 %e A264171 ..7.14.16.17.18.12.19...14..8.15.17.18.19.13...14..8..9.10.17.12.19 %Y A264171 Cf. A264172. %K A264171 nonn %O A264171 1,1 %A A264171 _R. H. Hardin_, Nov 06 2015