221256domain: NAppears in sequencesExpansion of Product_{k>=1} (1 - x^(18*k)) * (1 - x^(18*k-9)) * (1 + x^k) / (1 - x^k).at n=33A280947Sum of subword complexity (number of nonempty distinct subwords) of all binary strings of length n.at n=12A340885