%I A077131
%S A077131 2,7,18,35,58,89,130,177,236,303,376,459,556,659,768,895,1032,1181,
%T A077131 1338,1505,1684,1875,2072,2283,2510,2743,2984,3241,3510,3787,4070,4377,
%U A077131 4690,5021,5368,5721,6088,6467,6856,7257,7676,8107,8546,8995,9456,9923
%N A077131 Sum of odd indexed primes.
%e A077131 a(2)=7 as p_1=2, p_2=3 and p_3=5, therefore a(2)=p_1+p_3=7
%o A077131 (PARI) a(n)=if(n<1,0,sum(k=1,n, prime(2*k-1)))
%Y A077131 Sequence in context: A107615 A136583 A141631 this_sequence A086741 A051743 
               A054111
%Y A077131 Adjacent sequences: A077128 A077129 A077130 this_sequence A077132 A077133 
               A077134
%K A077131 nonn
%O A077131 1,1
%A A077131 Jon Perry (perry(AT)globalnet.co.uk), Nov 29 2002