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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 24 |
| 4 | 339 |
| 5 | 7392 |
| 6 | 230217 |
| 7 | 9689934 |
| 8 | 529634931 |
| 9 | 36463272996 |
| 10 | 3086776079745 |
| 11 | 315108659732034 |
| 12 | 38170141911313467 |
| 13 | 5412679282489599840 |
| 14 | 888197438344278978537 |
| 15 | 166988574370806672234630 |
| 16 | 35659091146526471860555587 |
| 17 | 8583030980293328579564829948 |
| 18 | 2312892203852608268226402385617 |
[1,3,24,339,7392,230217,9689934,529634931, 36463272996,3086776079745,315108659732034, 38170141911313467,5412679282489599840, 888197438344278978537,166988574370806672234630, 35659091146526471860555587, 8583030980293328579564829948, 2312892203852608268226402385617] |