A082934 - OEIS

A082934

A082928(1) + A082928(2) + ... + A082928(n).

1, 4, 8, 10, 16, 19, 27, 31, 40, 45, 57, 63, 77, 84, 99, 107, 125, 134, 154, 164, 185, 196, 220, 232, 257, 270, 297, 311, 341, 356, 388, 404, 437, 454, 489, 507, 545, 564, 603, 623, 665, 686, 730, 752, 797, 820, 868, 892, 941, 966, 1017, 1043, 1097, 1124, 1179

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..55.

FORMULA

seq = if n even then n/2 else n. seq = if n is prime then n+1. Sumseq = Sumseq + seq for n=1, 2, ...

PROG

(PARI) a(n)={sum(k=1, n, if(isprime(k), k+1, if(k%2, k, k/2)))};

CROSSREFS

Sequence in context: A302338 A311001 A311002 * A311003 A311004 A144570

Adjacent sequences: A082931 A082932 A082933 * A082935 A082936 A082937