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%I #7 Mar 31 2012 12:36:01
%S 1,1,2,2,6,10,17,45,153,561,1670,4780,14974,45555,140211,419924,
%T 1245122,3669858,10724147,31185503,89840674,256746801,728672328,
%U 2051488536,5732076608,15895090361,43752447121,119570863227,324496444134
%N Number of strings of numbers x(i=1..n) in 0..3 with sum i*x(i)^4 equal to n*81
%C Column 3 of A184848
%H R. H. Hardin, <a href="/A184842/b184842.txt">Table of n, a(n) for n = 1..73</a>
%e All solutions for n=5
%e ..3....0....0....2....1....1
%e ..0....3....0....1....2....0
%e ..0....3....0....3....2....0
%e ..3....0....0....2....3....3
%e ..0....0....3....2....0....2
%K nonn
%O 1,3
%A _R. H. Hardin_ Jan 23 2011
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