132075domain: NAppears in sequencesNumbers n such that n+2, n+4, n+6, n+8, n+10, n+12 and n+14 are all semiprimes.at n=10A268578Expansion of (Product_{k>0} (1 - x^(3*k)) / (1 - x^k))^3 in powers of x.at n=21A285927