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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 24 |
| 3 | 252 |
| 4 | 2788 |
| 5 | 31923 |
| 6 | 352105 |
| 7 | 3700992 |
| 8 | 37619035 |
| 9 | 375300388 |
| 10 | 3721757919 |
| 11 | 37050089673 |
| 12 | 372206961122 |
| 13 | 3774238125518 |
| 14 | 38503409891419 |
| 15 | 393429821383490 |
| 16 | 4011462863576801 |
[1,24,252,2788,31923,352105,3700992,37619035, 375300388,3721757919,37050089673,372206961122, 3774238125518,38503409891419,393429821383490, 4011462863576801] |