|
Search: id:A109194
|
|
|
| A109194 |
|
Number of returns to the x-axis (i.e. d or u steps hitting the x-axis) in all Grand Motzkin paths of length n. (A Grand Motzkin path of length n is a path in the half-plane x>=0, starting at (0,0), ending at (n,0) and consisting of steps u=(1,1), d=(1,-1) and h=(1,0).). |
|
+0
3
|
|
| 2, 6, 22, 70, 224, 700, 2174, 6702, 20572, 62920, 191932, 584220, 1775258, 5386846, 16326734, 49435150, 149557436, 452133880, 1366012832, 4124825872, 12449394278, 37558361290, 113266431860, 341467468420, 1029119688014
(list; graph; listen)
|
|
|
Search completed in 0.001 seconds
|
