99445domain: NAppears in sequencesNumbers k such that k, k+2, k+4, k+6, k+8, k+10, k+12 are semiprimes.at n=8A092129Expansion of b(2)*b(4)*b(6)/(x^8-x^4-x+1), where b(k) = (1-x^k)/(1-x).at n=34A265055