Triangle read by rows: T(n,k) is number of Dyck paths of semilength n having k ascents of length 1 starting at an even level.

A102404

Triangle read by rows: T(n,k) is number of Dyck paths of semilength n having k ascents of length 1 starting at an even level.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =2a(7) =2a(8) =0a(9) =1a(10) =5a(11) =5a(12) =3a(13) =0a(14) =1a(15) =14a(16) =14a(17) =9a(18) =4a(19) =0a(20) =1a(21) =39a(22) =46a(23) =27a(24) =14a(25) =5a(26) =0a(27) =1a(28) =114a(29) =143

External references