OFFSET
1,2
COMMENTS
a(n) = 1 + Sum_{k=1..n} A101040(k);
asymptotically: a(n) ~ n*log(log(n))/log(n).
Primes counted with multiplicity. - Harvey P. Dale, Feb 16 2024
MATHEMATICA
Accumulate[Table[If[PrimeOmega[n]<3, 1, 0], {n, 80}]] (* Harvey P. Dale, Feb 16 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 28 2004
STATUS
approved