155106

Appears in sequences

• Number of n-covers of a labeled n-set.at n=5A054780
• Triangle read by rows: T(n,k) = number of k-covers of a labeled n-set, k=1..2^n-1.at n=30A055154
• Number of 5-block covers of a labeled n-set.at n=2A095154
• a(n) = A266196(A000079(n)); indices of powers of 2 in A266195.at n=42A266186