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Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^3 equal to n^2*343
0

%I #4 Mar 31 2012 12:35:59

%S 1,1,1,1,3,7,69,574,3336,23562,140933,948340,5733551,37091416,

%T 225775799,1419329282,8589008422

%N Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^3 equal to n^2*343

%C Column 7 of A184318

%e All solutions for n=5

%e ..0....0....7

%e ..0....0....4

%e ..0....7....4

%e ..0....7....5

%e ..7....0....6

%K nonn

%O 1,5

%A _R. H. Hardin_ Jan 10 2011