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A221935 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.

%I A221935 #6 Jul 23 2025 02:20:49
%S A221935 28,5622,799632,119035112,17626884659,2611330803361,386840503637732,
%T A221935 57306383975427486,8489341273827367120,1257607107085271304144,
%U A221935 186301337661284652338010,27598594360590020663604925
%N A221935 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.
%C A221935 Column 5 of A221937
%H A221935 R. H. Hardin, <a href="/A221935/b221935.txt">Table of n, a(n) for n = 1..125</a>
%F A221935 Empirical: a(n) = 139*a(n-1) +1565*a(n-2) -28842*a(n-3) -369727*a(n-4) +1342456*a(n-5) +27113117*a(n-6) +34514978*a(n-7) -1040783248*a(n-8) -752172735*a(n-9) -7514497431*a(n-10) +3813284858*a(n-11) -7857119331*a(n-12) +165551321671*a(n-13) +153295270688*a(n-14) +67167089407*a(n-15) +194143861216*a(n-16) -17802740958*a(n-17) +352253527909*a(n-18) -217093267050*a(n-19) -103711174603*a(n-20) +24768760853*a(n-21) +6245517002*a(n-22) +10757772379*a(n-23) -253702884*a(n-24) -2234119424*a(n-25) +988262416*a(n-26) +31172608*a(n-27) -79610304*a(n-28) +7948800*a(n-29)
%e A221935 Some solutions for n=3
%e A221935 ..0..4..0..1..2....0..3..1..0..2....0..3..1..0..1....0..3..0..2..1
%e A221935 ..0..1..2..1..0....0..2..0..3..0....0..0..2..3..0....0..1..0..1..0
%e A221935 ..0..1..1..0..2....1..0..1..1..1....0..2..1..2..0....0..2..3..1..1
%K A221935 nonn
%O A221935 1,1
%A A221935 _R. H. Hardin_ Feb 01 2013