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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 14 |
| 4 | 35 |
| 5 | 96 |
| 6 | 242 |
| 7 | 609 |
| 8 | 1483 |
| 9 | 3565 |
| 10 | 8376 |
| 11 | 19389 |
| 12 | 44254 |
| 13 | 99584 |
| 14 | 221470 |
| 15 | 486810 |
| 16 | 1058914 |
| 17 | 2280519 |
| 18 | 4866492 |
| 19 | 10294313 |
| 20 | 21598679 |
| 21 | 44966391 |
| 22 | 92930485 |
| 23 | 190721585 |
| 24 | 388828094 |
| 25 | 787710401 |
| 26 | 1586166758 |
| 27 | 3175548134 |
| 28 | 6322372729 |
| 29 | 12520759979 |
| 30 | 24669499432 |
| 31 | 48367447687 |
| 32 | 94381633962 |
| 33 | 183331308393 |
[1,1,4,14,35,96,242,609,1483,3565,8376,19389, 44254,99584,221470,486810,1058914,2280519,4866492, 10294313,21598679,44966391,92930485,190721585, 388828094,787710401,1586166758,3175548134, 6322372729,12520759979,24669499432,48367447687, 94381633962,183331308393] |