Search: id:A000156
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%I A000156
%S A000156 1,48,1104,16192,170064,1362336,8662720,44981376,195082320,721175536,
%T A000156 2319457632,6631997376,17231109824,41469483552,93703589760,200343312768,
%U A000156 407488018512,793229226336,1487286966928,2697825744960,4744779429216
%N A000156 Number of ways of writing n as a sum of 24 squares.
%D A000156 E. Grosswald, Representations of Integers as Sums of Squares. Springer-Verlag, 
               NY, 1985, p. 107.
%D A000156 G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers. 
               3rd ed., Oxford Univ. Press, 1954, p. 314.
%D A000156 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 A000156 T. D. Noe, <a href="b000156.txt">Table of n, a(n) for n=0..10000</a>
%H A000156 H. H. Chan and C. Krattenthaler, <a href="http://arXiv.org/abs/math.NT/
               0407061">Recent progress in the study of representations of integers 
               as sums of squares</a>
%H A000156 <a href="Sindx_Su.html#ssq">Index entries for sequences related to sums 
               of squares</a>
%p A000156 (sum(x^(m^2),m=-10..10))^24;
%t A000156 Needs["NumberTheory`NumberTheoryFunctions`"]; Table[SumOfSquaresR[24, 
               n], {n, 0, 20}] (*Chandler*)
%Y A000156 Sequence in context: A089903 A160068 A010839 this_sequence A022077 A010964 
               A035719
%Y A000156 Adjacent sequences: A000153 A000154 A000155 this_sequence A000157 A000158 
               A000159
%K A000156 nonn,easy
%O A000156 0,2
%A A000156 N. J. A. Sloane (njas(AT)research.att.com).
%E A000156 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 28 2006

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