212762

Appears in sequences

• Triangle T(n,k), n>=0, 0<=k<=C(n,2), read by rows: T(n,k) = number of k-length saturated chains in the poset of Dyck paths of semilength n ordered by inclusion.at n=35A193536
• The number of binary pattern classes in the (2,n)-rectangular grid with 5 '1's and (2n-5) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.at n=18A222715
• Number of length n+7 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=18A256822