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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 12 |
| 3 | 101 |
| 4 | 732 |
| 5 | 4795 |
| 6 | 27921 |
| 7 | 147012 |
| 8 | 723580 |
| 9 | 3337980 |
| 10 | 14511011 |
| 11 | 59861245 |
| 12 | 235609265 |
| 13 | 887651008 |
| 14 | 3207981101 |
| 15 | 11143521040 |
| 16 | 37284296392 |
| 17 | 120416051739 |
| 18 | 376205293077 |
| 19 | 1139267891524 |
| 20 | 3350419462463 |
| 21 | 9584861050421 |
| 22 | 26715225919808 |
[7,12,101,732,4795,27921,147012,723580,3337980, 14511011,59861245,235609265,887651008,3207981101, 11143521040,37284296392,120416051739,376205293077, 1139267891524,3350419462463,9584861050421, 26715225919808] |