%I #4 May 21 2016 14:22:13
%S 2,26,15526,151165506068
%N 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).
%e 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).
%t 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]
%Y Cf. A001222, A273380.
%K nonn,more
%O 1,1
%A _Giovanni Resta_, May 21 2016
