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A317128 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 23 |
| 5 | 112 |
| 6 | 652 |
| 7 | 4425 |
| 8 | 34358 |
| 9 | 299971 |
| 10 | 2910304 |
| 11 | 31059715 |
| 12 | 361603228 |
| 13 | 4560742758 |
| 14 | 61947243329 |
| 15 | 901511878198 |
| 16 | 13994262184718 |
| 17 | 230811430415207 |
| 18 | 4030772161073249 |
| 19 | 74301962970014978 |
| 20 | 1441745847111969415 |
| 21 | 29374226224980834077 |
| 22 | 626971133730275593916 |
[1,1,2,6,23,112,652,4425,34358,299971,2910304, 31059715,361603228,4560742758,61947243329, 901511878198,13994262184718,230811430415207, 4030772161073249,74301962970014978, 1441745847111969415,29374226224980834077, 626971133730275593916] |