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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 1840 |
| 3 | 6809 |
| 4 | 15075 |
| 5 | 29776 |
| 6 | 57677 |
| 7 | 113330 |
| 8 | 228657 |
| 9 | 473562 |
| 10 | 1000381 |
| 11 | 2139866 |
| 12 | 4607729 |
| 13 | 9947906 |
| 14 | 21481485 |
| 15 | 46333458 |
| 16 | 99752209 |
| 17 | 214296842 |
| 18 | 459341309 |
| 19 | 982407146 |
| 20 | 2096608977 |
| 21 | 4465367730 |
| 22 | 9492005773 |
| 23 | 20140323170 |
| 24 | 42660619313 |
[12,1840,6809,15075,29776,57677,113330,228657, 473562,1000381,2139866,4607729,9947906,21481485, 46333458,99752209,214296842,459341309,982407146, 2096608977,4465367730,9492005773,20140323170, 42660619313] |