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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 98 |
| 3 | 453 |
| 4 | 3143 |
| 5 | 10933 |
| 6 | 60401 |
| 7 | 188301 |
| 8 | 951113 |
| 9 | 2812057 |
| 10 | 13690793 |
| 11 | 39294261 |
| 12 | 188823533 |
| 13 | 531699829 |
| 14 | 2551208657 |
| 15 | 7083277713 |
| 16 | 34139004377 |
| 17 | 93677247421 |
| 18 | 454955695853 |
| 19 | 1235099875965 |
| 20 | 6055154070065 |
| 21 | 16269918251065 |
| 22 | 80602553434841 |
[7,98,453,3143,10933,60401,188301,951113,2812057, 13690793,39294261,188823533,531699829,2551208657, 7083277713,34139004377,93677247421,454955695853, 1235099875965,6055154070065,16269918251065, 80602553434841] |