A108130 - OEIS

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A108130

Partial sums of A108129.

2, 3, 5, 6, 7, 9, 12, 13, 15, 16, 17, 21, 24, 25, 29, 30, 32, 34, 35, 38, 40, 47, 48, 52, 53, 54, 56, 57, 58, 70, 73, 75, 79, 84, 85, 87, 94, 95, 97, 98, 101, 103, 108, 109, 113, 114, 117, 119, 120, 121, 131, 134, 136, 146, 155, 157, 165, 166, 167, 179, 180

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..61.

PROG

(PARI) f(n) = my(k=2*n-1, m=1); while(!isprime(k*2^m-1), m++); m; \\ A108129

a(n) = sum(k=1, n, a(k));

CROSSREFS

Cf. A108129.

Sequence in context: A082984 A085717 A253083 * A195060 A153763 A345982

Adjacent sequences: A108127 A108128 A108129 * A108131 A108132 A108133