238356

Appears in sequences

• Triangle read by rows: T(n,k) (0<=k<=n) is the number of Delannoy paths of length n, having k (1,1)-steps on the line y=x (a Delannoy path of length n is a path from (0,0) to (n,n), consisting of steps (E=1,0), N=(0,1) and D(1,1)).at n=47A109979
• Number of permutations of [n] with exactly four (possibly overlapping) occurrences of the consecutive pattern 3412.at n=3A264323
• G.f.: exp( Sum_{n>=1} A052886(n) * x^n/n ).at n=7A293379