A092847 a(n) = Sum_{k=1..n} round(prime(k) / log(prime(k))).

3, 6, 9, 13, 18, 23, 29, 35, 42, 51, 60, 70, 81, 92, 104, 117, 131, 146, 162, 179, 196, 214, 233, 253, 274, 296, 318, 341, 364, 388, 414, 441, 469, 497, 527, 557, 588, 620, 653, 687, 722, 757, 793, 830, 867, 905, 944, 985, 1027, 1069, 1112, 1156, 1200, 1245, 1291

Offset

1,1

Comments

Partial sums of A002036. - Robert Israel, Jul 05 2015

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

N:= 1000: # to get a(1) to a(N)
M:= ithprime(N):
Primes:= select(isprime, [2, seq(2*i+1, i=1..(M-1)/2)]):
A002036:= map(t -> round(t/log(t)), Primes):
ListTools:-PartialSums(%); # Robert Israel, Jul 05 2015

Crossrefs

Cf. A002036.

Sequence in context: A129403 A323622 A154287 * A143975 A005488 A048202

Adjacent sequences: A092844 A092845 A092846 * A092848 A092849 A092850

Keyword

easy,nonn

Author

Jorge Coveiro, Apr 15 2004

Status

approved