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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 29 |
| 5 | 73 |
| 6 | 168 |
| 7 | 410 |
| 8 | 962 |
| 9 | 2317 |
| 10 | 5483 |
| 11 | 13131 |
| 12 | 31193 |
| 13 | 74509 |
| 14 | 177311 |
| 15 | 423025 |
| 16 | 1007505 |
| 17 | 2402354 |
| 18 | 5723761 |
| 19 | 13644587 |
| 20 | 32514730 |
| 21 | 77501115 |
| 22 | 184698088 |
| 23 | 440216833 |
| 24 | 1049148789 |
| 25 | 2500520812 |
| 26 | 5959478837 |
| 27 | 14203542282 |
| 28 | 33851496564 |
| 29 | 80679640434 |
| 30 | 192285583548 |
[1,2,5,13,29,73,168,410,962,2317,5483,13131,31193, 74509,177311,423025,1007505,2402354,5723761, 13644587,32514730,77501115,184698088,440216833, 1049148789,2500520812,5959478837,14203542282, 33851496564,80679640434,192285583548] |