721638domain: NAppears in sequencesNumber of "cubic partitions" of n: expansion of Product_{k>0} 1/((1-x^(2k))^2*(1-x^(2k-1))) in powers of x.at n=42A002513Number of non-isomorphic graphs on 4n vertices whose edges are the union of two n-edge matchings.at n=21A305168