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 A264271 #6 Nov 10 2015 11:32:01 %S A264271 1156,160000,53290000,13954224384,4035639032100,1138084297605025, %T A264271 324302970384650401,92186952472695083584,26232276993922103173281, %U A264271 7462849422249980275347009,2123325373891488033889110724 %N A264271 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having index change +-(.,.) 0,0 1,0 or 1,2. %C A264271 Column 7 of A264272. %H A264271 R. H. Hardin, <a href="/A264271/b264271.txt">Table of n, a(n) for n = 1..109</a> %e A264271 Some solutions for n=2 %e A264271 ..0..1..2.11.14..5..6..7....0.11.10..3.12..5..6..7....0.11..2..3.14..5..6..7 %e A264271 .16.19.10.21.12..3..4.15...16..1..2.19.22.13..4.23....8..9.10..1..4.13.22.15 %e A264271 ..8.17.18..9.20.13.22.23....8.17.18..9.20.21.14.15...16.17.18.19.20.21.12.23 %Y A264271 Cf. A264272. %K A264271 nonn %O A264271 1,1 %A A264271 _R. H. Hardin_, Nov 10 2015