223333

Appears in sequences

• Numbers of the form 6*k+1 that use only digits 2 and 3.at n=11A152834
• Number of permutations of {0,1,...,2n} with first element n whose sequence of ascents and descents forms a Dyck path.at n=5A316727
• Number T(n,k) of permutations of {0,1,...,2n} with first element k whose sequence of ascents and descents forms a Dyck path; triangle T(n,k), n>=0, 0<=k<=2n, read by rows.at n=30A316728