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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 876 |
| 3 | 21116 |
| 4 | 268630 |
| 5 | 6812856 |
| 6 | 183324631 |
| 7 | 4021047904 |
| 8 | 89397422003 |
| 9 | 2107800484124 |
| 10 | 48991993784653 |
| 11 | 1122852568198335 |
| 12 | 25900643054077073 |
| 13 | 599236232228096280 |
| 14 | 13831438744530944473 |
| 15 | 319108863737459622613 |
[1,876,21116,268630,6812856,183324631,4021047904, 89397422003,2107800484124,48991993784653, 1122852568198335,25900643054077073, 599236232228096280,13831438744530944473, 319108863737459622613] |