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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 2032 |
| 4 | 15326 |
| 5 | 101628 |
| 6 | 657028 |
| 7 | 4109278 |
| 8 | 25421672 |
| 9 | 155713446 |
| 10 | 949556490 |
| 11 | 5771152218 |
| 12 | 35012940148 |
| 13 | 212158079476 |
| 14 | 1284620610228 |
| 15 | 7774639010740 |
| 16 | 47038657576938 |
| 17 | 284540271729956 |
| 18 | 1720987141305056 |
| 19 | 10408196505797294 |
[16,256,2032,15326,101628,657028,4109278,25421672, 155713446,949556490,5771152218,35012940148, 212158079476,1284620610228,7774639010740, 47038657576938,284540271729956,1720987141305056, 10408196505797294] |