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A109723
Sum of the first 2n+1 primes.
4
2, 10, 28, 58, 100, 160, 238, 328, 440, 568, 712, 874, 1060, 1264, 1480, 1720, 1988, 2276, 2584, 2914, 3266, 3638, 4028, 4438, 4888, 5350, 5830, 6338, 6870, 7418, 7982, 8582, 9206, 9854, 10538, 11240, 11966, 12718, 13490, 14288, 15116, 15968, 16840
OFFSET
0,1
COMMENTS
Bisection of A007504.
LINKS
FORMULA
a(n) = A007504(2n+1).
MATHEMATICA
f[n_] := Sum[Prime[k], {k, n}]; Table[f[2n + 1], {n, 0, 42}]
Take[Accumulate[Prime[Range[160]]], {1, 160, 2}] (* Harvey P. Dale, Jan 11 2011 *)
PROG
(PARI) a(n) = sum(k=1, 2*n+1, prime(k)); \\ Michel Marcus, Jan 31 2019
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Aug 10 2005
EXTENSIONS
Edited and extended by Ray Chandler, Aug 11 2005
STATUS
approved