99029domain: NAppears in sequencesS_7 sequence in partition of integers > 1 described in A240521.at n=17A240524Expansion of Sum_{i>=1} mu(i)^2*i*x^i/(1 - x^i) / Product_{j>=1} (1 - x^j), where mu() is the Moebius function (A008683).at n=28A281904