254223domain: NAppears in sequencesExpansion of Product_{m>=1} (1+m*q^m)^-12.at n=12A022704Number of subsets of {1,...,n} containing two elements whose difference is 2.at n=18A209398a(n) = [x^n] Product_{k>=1} 1/(1 + k*x^k)^n.at n=12A297326