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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 93 |
| 4 | 494 |
| 5 | 2801 |
| 6 | 16062 |
| 7 | 91161 |
| 8 | 517646 |
| 9 | 2942681 |
| 10 | 16724094 |
| 11 | 95039817 |
| 12 | 540117614 |
| 13 | 3069530009 |
| 14 | 17444277726 |
| 15 | 99136698537 |
| 16 | 563399082830 |
| 17 | 3201826086713 |
| 18 | 18196142535870 |
| 19 | 103409617841865 |
| 20 | 587682198231086 |
| 21 | 3339828270813785 |
[1,14,93,494,2801,16062,91161,517646,2942681, 16724094,95039817,540117614,3069530009, 17444277726,99136698537,563399082830, 3201826086713,18196142535870,103409617841865, 587682198231086,3339828270813785] |