Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n (n>=1) having k (0<=k<=n-1) upper interactions.

A247285

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n (n>=1) having k (0<=k<=n-1) upper interactions.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =5a(8) =7a(9) =1a(10) =1a(11) =7a(12) =19a(13) =14a(14) =1a(15) =1a(16) =9a(17) =36a(18) =59a(19) =26a(20) =1a(21) =1a(22) =11a(23) =58a(24) =150a(25) =162a(26) =46a(27) =1a(28) =1a(29) =13

External references