%I A000152
%S A000152 1,32,480,4480,29152,140736,525952,1580800,3994080,8945824,18626112,
%T A000152 36714624,67978880,118156480,197120256,321692928,509145568,772845120,
%U A000152 1143441760,1681379200,2428524096,3392205824,4658843520,6411152640
%N A000152 Number of ways of writing n as a sum of 16 squares.
%D A000152 G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers. 
               3rd ed., Oxford Univ. Press, 1954, p. 314.
%D A000152 E. Grosswald, Representations of Integers as Sums of Squares. Springer-Verlag, 
               NY, 1985, p. 107.
%D A000152 S. C. Milne, Infinite families of exact sums of squares formulas, Jacobi 
               elliptic functions, continued fractions and Schur functions, Ramanujan 
               J., 6 (2002), 7-149.
%H A000152 T. D. Noe, <a href="b000152.txt">Table of n, a(n) for n=0..10000</a>
%H A000152 <a href="Sindx_Su.html#ssq">Index entries for sequences related to sums 
               of squares</a>
%p A000152 (sum(x^(m^2),m=-10..10))^16;
%t A000152 Needs["NumberTheory`NumberTheoryFunctions`"]; Table[SumOfSquaresR[16, 
               n], {n, 0, 23}] (*Chandler*)
%Y A000152 Cf. A022047(n)=A000152(2*n).
%Y A000152 Sequence in context: A010837 A022724 A125467 this_sequence A022069 A085539 
               A091364
%Y A000152 Adjacent sequences: A000149 A000150 A000151 this_sequence A000153 A000154 
               A000155
%K A000152 nonn,easy
%O A000152 0,2
%A A000152 N. J. A. Sloane (njas(AT)research.att.com).
%E A000152 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 28 2006