Triangle read by rows: T(n,k) (0<=k<=n) is the number of Delannoy paths of length n that start with exactly k (1,1) steps.

A110169

Triangle read by rows: T(n,k) (0<=k<=n) is the number of Delannoy paths of length n that start with exactly k (1,1) steps.

Terms

    a(0) =1a(1) =2a(2) =1a(3) =10a(4) =2a(5) =1a(6) =50a(7) =10a(8) =2a(9) =1a(10) =258a(11) =50a(12) =10a(13) =2a(14) =1a(15) =1362a(16) =258a(17) =50a(18) =10a(19) =2a(20) =1a(21) =7306a(22) =1362a(23) =258a(24) =50a(25) =10a(26) =2a(27) =1a(28) =39650a(29) =7306

External references