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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 9 |
| 3 | 19 |
| 4 | 74 |
| 5 | 139 |
| 6 | 410 |
| 7 | 1799 |
| 8 | 5907 |
| 9 | 16494 |
| 10 | 53290 |
| 11 | 184915 |
| 12 | 593160 |
| 13 | 1846238 |
| 14 | 5986532 |
| 15 | 19644799 |
| 16 | 63120477 |
| 17 | 201894029 |
| 18 | 652765881 |
| 19 | 2113653016 |
| 20 | 6806905917 |
| 21 | 21913260238 |
| 22 | 70736938785 |
| 23 | 228339832475 |
| 24 | 736091706666 |
| 25 | 2373144545904 |
| 26 | 7656031069031 |
[16,9,19,74,139,410,1799,5907,16494,53290,184915, 593160,1846238,5986532,19644799,63120477, 201894029,652765881,2113653016,6806905917, 21913260238,70736938785,228339832475,736091706666, 2373144545904,7656031069031] |