38994domain: NAppears in sequences(k^2)-th k-smooth number for k = prime(n).at n=24A133581G.f.: (1+x)^(2*g)*(1+x^3)^(3*g)/((1-x^2)*(1-x^4))-x^(2*g)*(1+x)^4/((1-x^2)*(1-x^4)) for g=3.at n=23A199629Expansion of e.g.f. ( Product_{k>0} 1/(1-x^k) )^(1/(1-x)).at n=6A356335