21041

Appears in sequences

• a(n) = 25*n^2 + 15*n + 1021.at n=28A214732
• Number of integer compositions of n whose leaders of anti-runs are strictly decreasing.at n=18A374680
• Number of maximal chains in the poset of all binary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.at n=9A378382
• Triangle read by rows: T(n,k) is the number of maximal chains in the poset of all k-ary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.at n=37A378588