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

A102405

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =1a(5) =10a(6) =3a(7) =1a(8) =26a(9) =12a(10) =3a(11) =1a(12) =72a(13) =41a(14) =15a(15) =3a(16) =1a(17) =206a(18) =143a(19) =58a(20) =18a(21) =3a(22) =1a(23) =606a(24) =492a(25) =231a(26) =76a(27) =21a(28) =3a(29) =1

External references