cp's OEIS Frontend

A188977 Number of nX3 array permutations with each element moved but moved no more than a city block distance of two.

%I A188977 #7 Jul 22 2025 11:30:10
%S A188977 2,116,7264,295264,12838276,577290185,25631148992,1136766429824,
%T A188977 50487034527632,2241979819401172,99549503635633660,
%U A188977 4420377191555167852,196282145900912402736,8715672825193463217812,387009187279257877916264
%N A188977 Number of nX3 array permutations with each element moved but moved no more than a city block distance of two.
%C A188977 Column 3 of A188981
%H A188977 R. H. Hardin, <a href="/A188977/b188977.txt">Table of n, a(n) for n = 1..200</a>
%e A188977 Some solutions for 4X3
%e A188977 ..1..3..0....1..7..0....2..0..5....2..0..1....1..3..8....1..3..8....1..2..5
%e A188977 ..7..2.11....9..8.11....4..1.11....9..5..4....0..2..4....9..0..7....0..6.11
%e A188977 ..4..9.10....3..5..2...10..3..7....7..3..6....9..6.10...10..4..2....3..8.10
%e A188977 ..6..8..5....6..4.10....6..8..9...11..8.10...11..7..5...11..6..5....7..4..9
%K A188977 nonn
%O A188977 1,1
%A A188977 _R. H. Hardin_ Apr 14 2011