%I A105856
%S A105856 0,1,2,4,7,12,20,26,32,44,52,61,78,91,107,121,135,163,187,201,219,251,
%T A105856 279,293,311,343,367,396,421,446,496,540,570,611,648,656,665,682,708,
%U A105856 751,780,811,871,919,939,962,1005,1071,1132,1161,1201,1270,1327,1347
%N A105856 a(n) = a(n-1) + A104647(n), a(0) = 0.
%C A105856 a(n)/(n^2) ---> 1/2.
%Y A105856 Sequence in context: A018147 A125892 A072642 this_sequence A010672 A122515 
               A036372
%Y A105856 Adjacent sequences: A105853 A105854 A105855 this_sequence A105857 A105858 
               A105859
%K A105856 nonn
%O A105856 0,3
%A A105856 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 23 2005