416560

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=38A059443
• Number of 4-block bicoverings of an n-set.at n=8A059945
• a(n) = A062402(2^n-1).at n=17A096854