167503724544domain: NAppears in sequencesa(n) = least positive integer k satisfying Omega(k) = Omega(k+1)+Omega(k+2)....+Omega(k+n), where Omega = A001222 = number of prime factors, counting multiplicity.at n=9A076804Number of 4-cycles in the n-Sierpinski tetrahedron graph.at n=17A292542