200589

Appears in sequences

• Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 4 subsets of the cover and that intersection of every 4 subsets of the cover contains at most one point.at n=5A058791
• An unrestricted partition statistic: sum of A179864 over row n.at n=32A179862
• Number of nonseparable rooted maps of genus n with one vertex and one face.at n=4A305872
• Array read by antidiagonals: A(n,k) is the number of nonisomorphic T_0 n-regular set multipartitions (multisets of sets) on a k-set.at n=59A331508
• Numbers being the smallest positive integer having its digits (Cf. A179239) from which two digits can be chosen, the difference being any value from 0 to 9.at n=10A365375