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 A189647 #7 Jun 07 2021 15:15:24 %S A189647 13,4777,799069,157346785,30010432933,5760755884032,1104421532180261, %T A189647 211788908613601649,40611524427488470629,7787535228500656118433, %U A189647 1493309632024085211828077,286351787186005572629329841 %N A189647 Number of n X 6 array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally. %C A189647 Column 6 of A189650. %H A189647 R. H. Hardin, <a href="/A189647/b189647.txt">Table of n, a(n) for n = 1..200</a> %e A189647 Some solutions for 3 X 6 %e A189647 ..0..2..7..4..3..5....0..2..7..4..3..5....0..6..7..3.11..5....0..8..2..3..4..5 %e A189647 ..1.14.13.10.15.11....1.12..8..9.10.11....1..2.13..4..9.16....1.12.15.14..9.11 %e A189647 .12..6..9..8.17.16...13..6.14.16.15.17...12.14.15..8.17.10....7..6.13.10.17.16 %Y A189647 Cf. A189650. %K A189647 nonn %O A189647 1,1 %A A189647 _R. H. Hardin_ Apr 24 2011