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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 76 |
| 3 | 476 |
| 4 | 2980 |
| 5 | 18672 |
| 6 | 117386 |
| 7 | 739672 |
| 8 | 4664776 |
| 9 | 29428242 |
| 10 | 185670484 |
| 11 | 1171477424 |
| 12 | 7391425016 |
| 13 | 46636189140 |
| 14 | 294251036912 |
| 15 | 1856576835280 |
| 16 | 11714070469768 |
| 17 | 73909919072136 |
| 18 | 466334575535548 |
| 19 | 2942337620960936 |
[10,76,476,2980,18672,117386,739672,4664776, 29428242,185670484,1171477424,7391425016, 46636189140,294251036912,1856576835280, 11714070469768,73909919072136,466334575535548, 2942337620960936] |