Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n having exactly k down steps hitting the x-axis.

A101275

Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n having exactly k down steps hitting the x-axis.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =13a(8) =7a(9) =1a(10) =1a(11) =44a(12) =34a(13) =10a(14) =1a(15) =1a(16) =165a(17) =150a(18) =64a(19) =13a(20) =1a(21) =1a(22) =680a(23) =659a(24) =346a(25) =103a(26) =16a(27) =1a(28) =1a(29) =3001

External references