60162048domain: NAppears in sequencesSmallest number beginning with 6 and having exactly n prime divisors counted with multiplicity.at n=20A106426p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S^2)^3.at n=22A291013a(n) = 2^(n-7)*(n^4 - 6*n^3 + 59*n^2 - 54*n)/3.at n=18A384506