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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 9 |
| 6 | 13 |
| 7 | 33 |
| 8 | 73 |
| 9 | 145 |
| 10 | 313 |
| 11 | 657 |
| 12 | 1549 |
| 13 | 3353 |
| 14 | 7221 |
| 15 | 16129 |
| 16 | 36785 |
| 17 | 81921 |
| 18 | 180529 |
| 19 | 403809 |
| 20 | 939573 |
| 21 | 2125193 |
| 22 | 4756893 |
| 23 | 10800801 |
| 24 | 25195577 |
| 25 | 57552721 |
| 26 | 130500393 |
| 27 | 298271153 |
| 28 | 700076797 |
| 29 | 1610366937 |
| 30 | 3680601093 |
| 31 | 8482477313 |
| 32 | 19929303521 |
[1,1,1,5,9,13,33,73,145,313,657,1549,3353,7221, 16129,36785,81921,180529,403809,939573,2125193, 4756893,10800801,25195577,57552721,130500393, 298271153,700076797,1610366937,3680601093, 8482477313,19929303521] |