| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 112 |
| 5 | 2544 |
| 6 | 110944 |
| 7 | 9088160 |
| 8 | 1395985024 |
| 9 | 405640228736 |
| 10 | 225812739686144 |
| 11 | 243825339649539840 |
| 12 | 515865727833142919168 |
| 13 | 2154502537039937189822464 |
| 14 | 17852312368540223401725132800 |
| 15 | 294428418578798287467609655705600 |
| 16 | 9684259826489059207872454620228222976 |
[1,1,2,10,112,2544,110944,9088160,1395985024, 405640228736,225812739686144,243825339649539840, 515865727833142919168,2154502537039937189822464, 17852312368540223401725132800, 294428418578798287467609655705600, 9684259826489059207872454620228222976] |