Triangle read by rows: T(n,k) is number of Grand Motzkin paths of length n having k returns to the x-axis (i.e., d or u steps hitting the x-axis).
A109193
Triangle read by rows: T(n,k) is number of Grand Motzkin paths of length n having k returns to the x-axis (i.e., d or u steps hitting the x-axis).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =6a(6) =1a(7) =14a(8) =4a(9) =1a(10) =30a(11) =20a(12) =1a(13) =64a(14) =68a(15) =8a(16) =1a(17) =140a(18) =196a(19) =56a(20) =1a(21) =318a(22) =524a(23) =248a(24) =16a(25) =1a(26) =750a(27) =1356a(28) =888a(29) =144
External references
- oeis: A109193