Triangle read by rows: number of Motzkin paths by length and by number of humps.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =7a(7) =1a(8) =1a(9) =15a(10) =5a(11) =1a(12) =31a(13) =18a(14) =1a(15) =1a(16) =63a(17) =56a(18) =7a(19) =1a(20) =127a(21) =160a(22) =34a(23) =1a(24) =1a(25) =255a(26) =432a(27) =138a(28) =9a(29) =1