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A221922 Number of nX2 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out straight through or left turns 1

%I #5 Jan 31 2013 18:15:14

%S 3,35,350,3487,34714,345744,3443699,34300167,341638088,3402798388,

%T 33892698751,337579518956,3362374079673,33490063280467,

%U 333569172221123,3322430051077535,33092211042163927,329606467201422876

%N Number of nX2 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out straight through or left turns

%C Column 2 of A221925

%H R. H. Hardin, <a href="/A221922/b221922.txt">Table of n, a(n) for n = 1..24</a>

%F Empirical: a(n) = 9*a(n-1) +12*a(n-2) -29*a(n-3) +41*a(n-4) +75*a(n-5) -129*a(n-6) -30*a(n-7) +61*a(n-8) -a(n-9) -4*a(n-10)

%e Some solutions for n=3

%e ..0..0....2..2....2..0....1..2....1..0....1..0....1..2....0..0....0..0....1..0

%e ..3..2....2..0....0..0....1..2....0..4....1..2....1..0....0..3....1..3....3..2

%e ..0..1....0..0....4..0....0..0....1..0....2..0....2..0....2..1....1..1....0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 31 2013

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Last modified April 18 03:01 EDT 2024. Contains 371767 sequences. (Running on oeis4.)