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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 37 |
| 3 | 92 |
| 4 | 320 |
| 5 | 1356 |
| 6 | 6279 |
| 7 | 30236 |
| 8 | 147448 |
| 9 | 713700 |
| 10 | 3458964 |
| 11 | 16761831 |
| 12 | 81068326 |
| 13 | 392498699 |
| 14 | 1903748357 |
| 15 | 9242300405 |
| 16 | 44898738589 |
| 17 | 218193853807 |
| 18 | 1060541170373 |
| 19 | 5155515413236 |
| 20 | 25063708598082 |
| 21 | 121851746401110 |
| 22 | 592419495632651 |
[3,37,92,320,1356,6279,30236,147448,713700, 3458964,16761831,81068326,392498699,1903748357, 9242300405,44898738589,218193853807,1060541170373, 5155515413236,25063708598082,121851746401110, 592419495632651] |