Search: id:A016725
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%I A016725
%S A016725 1,6,6,30,6,30,30,54,6,102,30,78,30,78,54,150,6,102,102,126,30,270,78,
%T A016725 150,30,150,78,318,54,174,150,198,6,390,102,270,102,222,126,390,30,246,
%U A016725 270,270,78,510,150,294,30,390,150,510,78,318,318,390,54,630,174,366
%N A016725 Number of integer solutions to x^2+y^2+z^2 = n^2, allowing zeros and 
               distinguishing signs and order.
%H A016725 Michael Gilleland, <a href="selfsimilar.html">Some Self-Similar Integer 
               Sequences</a>
%H A016725 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SumofSquaresFunction.html">Sum of Squares Function</a>
%p A016725 for n from 0 to 60 do s:=0: for x from -n to n do for y from -n to n 
               do for z from -n to n do if (x^2+y^2+z^2) = n^2 then s:=s+1 fi od 
               od od: printf("%d, ",s) od:
%Y A016725 Cf. A005875.
%Y A016725 Sequence in context: A077193 A056482 A123874 this_sequence A151779 A066714 
               A054436
%Y A016725 Adjacent sequences: A016722 A016723 A016724 this_sequence A016726 A016727 
               A016728
%K A016725 nonn
%O A016725 0,2
%A A016725 csvcjld(AT)nomvst.lsumc.edu
%E A016725 Revised description and Maple program from C. Ronaldo (aga_new_ac(AT)hotmail.com), 
               Dec 13 2004

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