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| n | a(n) |
|---|---|
| 7 | 877 |
| 8 | 18270 |
| 9 | 216006 |
| 10 | 1904301 |
| 11 | 13921922 |
| 12 | 89193846 |
| 13 | 517625311 |
| 14 | 2780643510 |
| 15 | 14036460424 |
| 16 | 67312339598 |
| 17 | 309183689612 |
| 18 | 1368888648981 |
| 19 | 5871001466715 |
| 20 | 24489742456347 |
| 21 | 99677744039362 |
| 22 | 396936924677881 |
| 23 | 1549990268577100 |
| 24 | 5946246979402065 |
| 25 | 22447258891006950 |
[877,18270,216006,1904301,13921922,89193846, 517625311,2780643510,14036460424,67312339598, 309183689612,1368888648981,5871001466715, 24489742456347,99677744039362,396936924677881, 1549990268577100,5946246979402065, 22447258891006950] |