%I A053879
%S A053879 0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,
%T A053879 0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,
%U A053879 0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1,0,1,4,2,2,4,1
%N A053879 n^2 mod 7.
%F A053879 Periodic with period 7.
%F A053879 a(n)=1/21*{5*(n mod 7)+11*[(n+1) mod 7]-4*[(n+2) mod 7]+2*[(n+3) mod 
               7]+8*[(n+4) mod 7]-7*[(n+5) mod 7]-[(n+6) mod 7]} with n>=0 - Paolo 
               P. Lava (ppl(AT)spl.at), Nov 27 2006
%Y A053879 Sequence in context: A062072 A140395 A061505 this_sequence A141035 A100854 
               A021707
%Y A053879 Adjacent sequences: A053876 A053877 A053878 this_sequence A053880 A053881 
               A053882
%K A053879 nonn
%O A053879 0,3
%A A053879 Stuart M. Ellerstein (ellerstein(AT)aol.com), Apr 01 2000
%E A053879 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 08 2000