%I #4 Feb 24 2013 16:08:18
%S 121,427,1562,5761,21239,78245,287858,1059674,3901868,14366833,
%T 52894813,194725954,716822517,2638639647,9712504051,35749337667,
%U 131581046318,484294944395,1782459967105,6560310404375,24144873322163,88863279809958
%N Number of (n+4)X1 arrays of occupancy after each element moves up to +4 places but not 0
%C Column 4 of A222555
%H R. H. Hardin, <a href="/A222551/b222551.txt">Table of n, a(n) for n = 1..117</a>
%F Empirical: a(n) = 9*a(n1) 28*a(n2) +35*a(n3) 15*a(n4) +12*a(n5) 96*a(n6) +274*a(n7) 265*a(n8) +24*a(n9) 7*a(n10) +29*a(n11) +3*a(n12) a(n13)
%e Some solutions for n=3
%e ..0....0....2....2....0....4....1....0....0....0....1....1....0....0....0....0
%e ..0....0....0....0....0....1....2....4....2....0....1....1....2....0....2....1
%e ..0....3....3....2....1....0....2....1....2....0....0....0....0....2....2....0
%e ..1....2....0....0....3....1....0....0....0....3....3....3....4....0....0....1
%e ..2....2....1....2....0....0....0....1....1....2....0....2....0....4....3....4
%e ..4....0....0....1....2....0....0....0....0....0....0....0....0....1....0....1
%e ..0....0....1....0....1....1....2....1....2....2....2....0....1....0....0....0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 24 2013
