2771685

Appears in sequences

• Triangle T(n,k) (n >= 2, k = 3..n+floor(n/2)) giving number of bicoverings of an n-set with k blocks.at n=32A059443
• Number of 8-block bicoverings of an n-set.at n=7A059949
• Number of n-block bicoverings of an n-set.at n=8A275517