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A346423
Numbers m such that Sum_{k=1..m} omega(k) = sigma(m).
0
11, 230, 52830, 160908, 6134334960
OFFSET
1,1
COMMENTS
Numbers k such that A013939(k) = sigma(k).
EXAMPLE
The sum of number of distinct primes dividing numbers up to 11 is 1+1+1+1+2+1+1+1+2+1 = sigma(11), so 11 is a term.
MATHEMATICA
s=0; Do[s=s+PrimeNu[n]; If[DivisorSigma[1, n]==s, Print[n]], {n, 2, 160908}]
CROSSREFS
Sequence in context: A305141 A296592 A108518 * A077736 A068122 A015287
KEYWORD
nonn,more
AUTHOR
Metin Sariyar, Jul 16 2021
EXTENSIONS
a(5) from Martin Ehrenstein, Aug 22 2021
STATUS
approved