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 A264517 #4 Nov 16 2015 17:12:35 %S A264517 4,4,196,1444,18769,186624,2007889,20738916,216384100,2246191236, %T A264517 23336228644,242343536656,2516566604161,26133852688384, %U A264517 271375312681729,2818084749524496,29263464821074276,303881662686399876 %N A264517 Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having directed index change -1,0 0,2 -1,-2 or 1,0. %C A264517 Column 5 of A264520. %H A264517 R. H. Hardin, <a href="/A264517/b264517.txt">Table of n, a(n) for n = 1..210</a> %H A264517 R. H. Hardin, <a href="/A264517/a264517.txt">Empirical recurrence of order 90</a> %F A264517 Empirical recurrence of order 90 (see link above) %e A264517 Some solutions for n=4 %e A264517 ..8..7.10..1..2..3....8..9.10..1..2..3....8..9..0..1..2..3....8..9..0.11..2..3 %e A264517 ..0.13.16.17..4..5....0.13..6.15..4..5...14.15..6.17..4..5...14..1.16..7..4..5 %e A264517 ..6.21.20..9.14.11...20..7.12.21.14.11...20..7.22.23.10.11....6.21.12.23.10.15 %e A264517 .12.27.26.15.28.29...26.27.28.29.16.17...12.13.28.29.16.21...24.13.26.29.28.17 %e A264517 .18.19.24.25.22.23...18.19.24.25.22.23...18.19.24.25.26.27...18.19.20.25.22.27 %Y A264517 Cf. A264520. %K A264517 nonn %O A264517 1,1 %A A264517 _R. H. Hardin_, Nov 16 2015