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A077126 Sum of even indexed primes. 4

%I

%S 3,10,23,42,71,108,151,204,265,336,415,504,605,712,825,956,1095,1246,

%T 1409,1582,1763,1956,2155,2378,2607,2846,3097,3360,3631,3912,4205,

%U 4516,4833,5170,5519,5878,6251,6634,7031,7440,7861,8294,8737,9194,9657

%N Sum of even indexed primes.

%C Partial sums of A031215. - _Michel Marcus_, Oct 27 2015

%e p_1=2, p_2=3, p_3=5 and p_4=7, therefore a(2) = p_2 + p_4 = 3 + 7 = 10.

%o (PARI) pc=1; ps=0; forprime (p=2,500,pc=3-pc; if (pc==1,ps=ps+p; print1(ps",")))

%Y Cf. A031215, A077131.

%K nonn

%O 1,1

%A _Jon Perry_, Nov 29 2002

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Last modified June 28 03:54 EDT 2016. Contains 274263 sequences.