Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2 starting at an even level (0<=k<=floor(n/2)).

A114462

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2 starting at an even level (0<=k<=floor(n/2)).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =7a(8) =1a(9) =18a(10) =19a(11) =5a(12) =54a(13) =59a(14) =18a(15) =1a(16) =166a(17) =191a(18) =65a(19) =7a(20) =522a(21) =631a(22) =242a(23) =34a(24) =1a(25) =1670a(26) =2123a(27) =906a(28) =154a(29) =9

External references