A184841 - OEIS

A184841

Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^4 equal to n*16

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

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

%K nonn

%O 1,3

%A _R. H. Hardin_ Jan 23 2011