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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 50 |
| 3 | 188 |
| 4 | 760 |
| 5 | 3309 |
| 6 | 14666 |
| 7 | 64607 |
| 8 | 283479 |
| 9 | 1243280 |
| 10 | 5452114 |
| 11 | 23905237 |
| 12 | 104828007 |
| 13 | 459770373 |
| 14 | 2016638186 |
| 15 | 8845269109 |
| 16 | 38796696140 |
| 17 | 170170211095 |
| 18 | 746407664707 |
| 19 | 3273942709889 |
| 20 | 14360456936977 |
| 21 | 62989372397071 |
[16,50,188,760,3309,14666,64607,283479,1243280, 5452114,23905237,104828007,459770373,2016638186, 8845269109,38796696140,170170211095,746407664707, 3273942709889,14360456936977,62989372397071] |