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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 19 |
| 5 | 46 |
| 6 | 107 |
| 7 | 244 |
| 8 | 547 |
| 9 | 1213 |
| 10 | 2665 |
| 11 | 5807 |
| 12 | 12567 |
| 13 | 27042 |
| 14 | 57899 |
| 15 | 123428 |
| 16 | 262115 |
| 17 | 554750 |
| 18 | 1170538 |
| 19 | 2463154 |
| 20 | 5170462 |
| 21 | 10829234 |
| 22 | 22635087 |
| 23 | 47223412 |
| 24 | 98353299 |
| 25 | 204519549 |
| 26 | 424665001 |
| 27 | 880581806 |
| 28 | 1823667221 |
| 29 | 3772341661 |
| 30 | 7794697759 |
| 31 | 16089424392 |
| 32 | 33178906531 |
| 33 | 68357928558 |
[1,3,8,19,46,107,244,547,1213,2665,5807,12567, 27042,57899,123428,262115,554750,1170538,2463154, 5170462,10829234,22635087,47223412,98353299, 204519549,424665001,880581806,1823667221, 3772341661,7794697759,16089424392,33178906531, 68357928558] |