%I A047801
%S A047801 1,5,14,29,50,74,111,149,197,247,308,370,451,526,613,706,815,
%T A047801 914,1037,1146,1284,1416,1565,1698,1876,2030,2209,2380,2578,
%U A047801 2757,2972,3168,3401,3612,3850,4071,4339,4575,4843,5089,5388
%N A047801 Number of different values of i^2+j^2+k^2+l^2 for i,j,k,l in [ 0,n ].
%H A047801 T. D. Noe, <a href="b047801.txt">Table of n, a(n) for n=0..100</a>
%t A047801 Table[ Length@Union@Flatten@Table[ i^2+j^2+k^2+l^2, {i, 0, n}, {j, i, 
               n}, {k, j, n}, {l, k, n} ], {n, 0, 48} ]
%Y A047801 Cf. A034966, A047800.
%Y A047801 Sequence in context: A024800 A005586 A031333 this_sequence A005918 A019262 
               A076042
%Y A047801 Adjacent sequences: A047798 A047799 A047800 this_sequence A047802 A047803 
               A047804
%K A047801 nonn,easy,nice
%O A047801 0,2
%A A047801 Wouter Meeussen (wouter.meeussen(AT)pandora.be)
%E A047801 Definition corrected by Jonathan Vos Post, Nov 14 2007