The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A077126 Sum of even-indexed primes. 4
 3, 10, 23, 42, 71, 108, 151, 204, 265, 336, 415, 504, 605, 712, 825, 956, 1095, 1246, 1409, 1582, 1763, 1956, 2155, 2378, 2607, 2846, 3097, 3360, 3631, 3912, 4205, 4516, 4833, 5170, 5519, 5878, 6251, 6634, 7031, 7440, 7861, 8294, 8737, 9194, 9657 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Partial sums of A031215. - Michel Marcus, Oct 27 2015 LINKS EXAMPLE p_1=2, p_2=3, p_3=5 and p_4=7, therefore a(2) = p_2 + p_4 = 3 + 7 = 10. PROG (PARI) pc=1; ps=0; forprime (p=2, 500, pc=3-pc; if (pc==1, ps=ps+p; print1(ps", "))) CROSSREFS Cf. A031215, A077131. Sequence in context: A166119 A041403 A271740 * A172113 A172112 A227347 Adjacent sequences:  A077123 A077124 A077125 * A077127 A077128 A077129 KEYWORD nonn AUTHOR Jon Perry, Nov 29 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 29 08:47 EST 2020. Contains 338762 sequences. (Running on oeis4.)