cp's OEIS Frontend

A222018 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.

%I A222018 #6 Jul 23 2025 02:22:50
%S A222018 28,9838,1892859,403317044,84799061141,17838051289367,
%T A222018 3753835631741568,789821887272883642,166189333434443018741,
%U A222018 34968169848205865653334,7357721396433443050132543,1548152408282663670986074421
%N A222018 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.
%C A222018 Column 5 of A222020
%H A222018 R. H. Hardin, <a href="/A222018/b222018.txt">Table of n, a(n) for n = 1..29</a>
%e A222018 Some solutions for n=3
%e A222018 ..0..3..0..0..2....0..2..3..0..0....0..1..3..0..0....0..2..1..0..2
%e A222018 ..0..2..2..2..0....0..1..0..1..3....0..3..1..0..2....0..2..2..0..0
%e A222018 ..0..2..0..0..2....1..3..0..0..1....1..2..0..2..0....1..0..2..1..2
%K A222018 nonn
%O A222018 1,1
%A A222018 _R. H. Hardin_ Feb 05 2013