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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 18 |
| 7 | 39 |
| 8 | 78 |
| 9 | 161 |
| 10 | 324 |
| 11 | 658 |
| 12 | 1316 |
| 13 | 2657 |
| 14 | 5314 |
| 15 | 10668 |
| 16 | 21347 |
| 17 | 42777 |
| 18 | 85554 |
| 19 | 171290 |
| 20 | 342580 |
| 21 | 685498 |
| 22 | 1371037 |
| 23 | 2742733 |
| 24 | 5485466 |
| 25 | 10972351 |
| 26 | 21944711 |
| 27 | 43892080 |
| 28 | 87784323 |
| 29 | 175574004 |
| 30 | 351148008 |
| 31 | 702307038 |
| 32 | 1404614076 |
| 33 | 2809249582 |
| 34 | 5618499824 |
| 35 | 11237042426 |
[1,1,2,4,9,18,39,78,161,324,658,1316,2657,5314, 10668,21347,42777,85554,171290,342580,685498, 1371037,2742733,5485466,10972351,21944711, 43892080,87784323,175574004,351148008,702307038, 1404614076,2809249582,5618499824,11237042426] |