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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 6 |
| 5 | 11 |
| 6 | 27 |
| 7 | 49 |
| 8 | 99 |
| 9 | 197 |
| 10 | 492 |
| 11 | 934 |
| 12 | 1846 |
| 13 | 3676 |
| 14 | 7347 |
| 15 | 14689 |
| 16 | 29379 |
| 17 | 58757 |
| 18 | 146892 |
| 19 | 279094 |
| 20 | 550846 |
| 21 | 1098021 |
| 22 | 2194212 |
| 23 | 4387512 |
| 24 | 8774582 |
| 25 | 17548869 |
| 26 | 35097640 |
| 27 | 70195230 |
| 28 | 140390438 |
| 29 | 280780860 |
| 30 | 561561715 |
| 31 | 1123123425 |
| 32 | 2246246851 |
[1,2,1,6,11,27,49,99,197,492,934,1846,3676,7347, 14689,29379,58757,146892,279094,550846,1098021, 2194212,4387512,8774582,17548869,35097640, 70195230,140390438,280780860,561561715,1123123425, 2246246851] |