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Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^3 equal to n*8
1

%I #5 Mar 31 2012 12:36:01

%S 1,1,2,2,5,9,22,47,95,197,394,819,1701,3493,7116,14361,28758,57108,

%T 112520,219936,426311,819230,1560326,2944805,5505613,10195038,

%U 18696068,33951438,61053269,108723478,191753754,334989788,579778121,994310140

%N Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^3 equal to n*8

%C Column 2 of A184720

%H R. H. Hardin, <a href="/A184713/b184713.txt">Table of n, a(n) for n = 1..190</a>

%e All solutions for n=5

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

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

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

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

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

%K nonn

%O 1,3

%A _R. H. Hardin_ Jan 20 2011