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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 264 |
| 3 | 547 |
| 4 | 1302 |
| 5 | 5613 |
| 6 | 24751 |
| 7 | 88153 |
| 8 | 325770 |
| 9 | 1253442 |
| 10 | 4776102 |
| 11 | 18038332 |
| 12 | 68413453 |
| 13 | 260114810 |
| 14 | 987697447 |
| 15 | 3748803674 |
| 16 | 14235050570 |
| 17 | 54059779607 |
| 18 | 205275615433 |
| 19 | 779466274820 |
| 20 | 2959884516219 |
| 21 | 11239652431853 |
| 22 | 42680251872417 |
[16,264,547,1302,5613,24751,88153,325770,1253442, 4776102,18038332,68413453,260114810,987697447, 3748803674,14235050570,54059779607,205275615433, 779466274820,2959884516219,11239652431853, 42680251872417] |