112860domain: NAppears in sequencesIrregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.at n=27A219731Expansion of Product_{n>0} ((1-x^n)/(1+x^n))^n in powers of x.at n=41A285675Sum of the second largest parts of the partitions of n into 10 parts.at n=48A326597