77178

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * A026769(n, k).at n=12A027243
• Number T(n,k) of set partitions of [n], where k is minimal such that for all j in [n]: j is member of block b implies b = 1 or at least one of j-1, ..., j-k is member of a block >= b-1; triangle T(n,k), n >= 0, 0 <= k <= max(floor(n/2), n-2), read by rows.at n=52A287640