| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 13 |
| 8 | 29 |
| 9 | 65 |
| 10 | 151 |
| 11 | 365 |
| 12 | 887 |
| 13 | 2185 |
| 14 | 5426 |
| 15 | 13636 |
| 16 | 34529 |
| 17 | 88017 |
| 18 | 225621 |
| 19 | 581461 |
| 20 | 1505490 |
| 21 | 3913987 |
| 22 | 10214576 |
| 23 | 26748565 |
| 24 | 70263410 |
| 25 | 185089117 |
| 26 | 488842459 |
| 27 | 1294194744 |
| 28 | 3433966729 |
| 29 | 9130325683 |
| 30 | 24322504467 |
[1,1,1,2,3,6,13,29,65,151,365,887,2185,5426,13636, 34529,88017,225621,581461,1505490,3913987, 10214576,26748565,70263410,185089117,488842459, 1294194744,3433966729,9130325683,24322504467] |