

A273381


2..a(n) is the smallest range in which the most common value of Omega(k) is n, where Omega(k) is the number of prime factors of k (A001222).


2




OFFSET

1,1


LINKS



EXAMPLE

Among the numbers from 2 to a(2)=26 the most common value of Omega is 2. Indeed, there are 9 numbers for which Omega is 1 (the primes) and 10 for which Omega is 2 (the semiprimes).


MATHEMATICA

a[n_] := Block[{c1=0, c2=0, v, k=1}, While[c2<=c1, v=PrimeOmega[++k]; If[v == n1, c1++]; If[v == n, c2++]]; k]; Array[a, 3]


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



