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A077131 Sum of odd-indexed primes. 4
2, 7, 18, 35, 58, 89, 130, 177, 236, 303, 376, 459, 556, 659, 768, 895, 1032, 1181, 1338, 1505, 1684, 1875, 2072, 2283, 2510, 2743, 2984, 3241, 3510, 3787, 4070, 4377, 4690, 5021, 5368, 5721, 6088, 6467, 6856, 7257, 7676, 8107, 8546, 8995, 9456, 9923 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Partial sums of A031368. - Michel Marcus, Oct 27 2015

LINKS

Table of n, a(n) for n=1..46.

EXAMPLE

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

PROG

(PARI) a(n)=if(n<1, 0, sum(k=1, n, prime(2*k-1)))

CROSSREFS

Cf. A031368, A077126.

Sequence in context: A307684 A141631 A172188 * A212685 A176854 A086741

Adjacent sequences:  A077128 A077129 A077130 * A077132 A077133 A077134

KEYWORD

nonn

AUTHOR

Jon Perry, Nov 29 2002

STATUS

approved

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Last modified October 26 11:29 EDT 2020. Contains 338027 sequences. (Running on oeis4.)