21406

Appears in sequences

• Series for first parallel moment of square lattice.at n=11A006728
• Number of ways to get ten-pin bowling score of 300-n.at n=47A079596
• Triangle read by rows: T(n,k) (n,k>=0) = number of peakless Motzkin paths of length n having k valleys (i.e., (1,-1) followed by (1,1)) at level zero (can be easily translated into RNA secondary structure terminology).at n=33A110333
• Number of peakless Motzkin paths of length n having no valleys (i.e., (1,-1) followed by (1,1)) at level zero (can be easily translated into RNA secondary structure terminology).at n=15A110334
• Numbers k such that the k-th triangular number contains only digits {1,2,9}.at n=6A119110