%I A064607
%S A064607 1,2,7,151,257,1823,3048,5588,6875,7201,8973,24099
%N A064607 Partial sum of Sigma_4(n) is divisible by n, where Sigma_4(n)=A001159(n).
%C A064607 Analogous sequences for various arithmetical functions are A050226, A056650, 
               A064605-A064607, A064610, A064611, A048290, A062982, A045345.
%F A064607 Mod[Sum{sigma_4(j), j=1..n}, n]=Mod[A064604(n), n]=0
%e A064607 Adding 4th-power divisor-sums for j=1,...,7 gives 1+17+82+273+626+1394+2402=4795 
               which is divisible by n=7, so 7 is here and the integer quotient 
               is 655.
%Y A064607 A001159, A064604 A050226, A056650, A064605-A064607, A064610-A064612, 
               A048290, A062982, A045345.
%Y A064607 Sequence in context: A120379 A101799 A062617 this_sequence A005345 A077746 
               A159034
%Y A064607 Adjacent sequences: A064604 A064605 A064606 this_sequence A064608 A064609 
               A064610
%K A064607 nonn
%O A064607 1,2
%A A064607 Labos E. (labos(AT)ana.sote.hu), Sep 24 2001