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 A188964 #7 Jul 22 2025 11:29:44 %S A188964 2,265,78976,22666641,4064659324,741295637637,144279772457456, %T A188964 28624027037417040,5598968416725014336,1090382503789570607376, %U A188964 212622119350607875451536,41520188783110631009991949 %N A188964 Number of nX3 array permutations with each element moved and moved by a city block distance of no more than three. %C A188964 Column 3 of A188966 %H A188964 R. H. Hardin, <a href="/A188964/b188964.txt">Table of n, a(n) for n = 1..17</a> %e A188964 Some solutions for 4X3 %e A188964 ..1..0..5....1..0..5....1..0..7....1..0..5....1..0..7....1..0..7....1..0..5 %e A188964 ..4..2.10....7..9..6....8..9..4....2..9.10....4..2.11....2.10..8....9..8..7 %e A188964 ..3..8..9...10..2..3....5..2..3...11..8..6....5..3..9....3.11..9...10..3..6 %e A188964 ..6.11..7....8.11..4...11..6.10....3..4..7...10..8..6....6..5..4....4.11..2 %K A188964 nonn %O A188964 1,1 %A A188964 _R. H. Hardin_ Apr 14 2011