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%I #5 Mar 31 2012 12:36:01
%S 1,1,2,2,3,7,13,25,54,122,253,558,1199,2596,5619,12049,25695,54733,
%T 115830,244106,512444,1070965,2229313,4622382,9546244,19639568,
%U 40254273,82200330,167244370,339055002,684919569,1378730235,2765690543,5528683663
%N Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^4 equal to n*16
%C Column 2 of A184848
%H R. H. Hardin, <a href="/A184841/b184841.txt">Table of n, a(n) for n = 1..151</a>
%e All solutions for n=5
%e ..2....0....0
%e ..0....2....0
%e ..0....2....0
%e ..2....0....0
%e ..0....0....2
%K nonn
%O 1,3
%A _R. H. Hardin_ Jan 23 2011