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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 37 |
| 5 | 94 |
| 6 | 236 |
| 7 | 584 |
| 8 | 1437 |
| 9 | 3529 |
| 10 | 8654 |
| 11 | 21210 |
| 12 | 51966 |
| 13 | 127302 |
| 14 | 311840 |
| 15 | 763864 |
| 16 | 1871094 |
| 17 | 4583243 |
[1,2,5,14,37,94,236,584,1437,3529,8654,21210, 51966,127302,311840,763864,1871094,4583243] |