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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 9 |
| 8 | 21 |
| 9 | 41 |
| 10 | 71 |
| 11 | 113 |
| 12 | 175 |
| 13 | 283 |
| 14 | 499 |
| 15 | 945 |
| 16 | 1833 |
| 17 | 3501 |
| 18 | 6475 |
| 19 | 11617 |
| 20 | 20479 |
| 21 | 36063 |
| 22 | 64287 |
| 23 | 116577 |
| 24 | 214215 |
| 25 | 395583 |
| 26 | 728673 |
| 27 | 1333883 |
| 28 | 2427239 |
| 29 | 4403243 |
| 30 | 7991759 |
| 31 | 14548745 |
| 32 | 26584661 |
| 33 | 48714993 |
| 34 | 89370903 |
| 35 | 163903509 |
| 36 | 300276435 |
| 37 | 549583299 |
| 38 | 1005524031 |
[1,1,1,1,1,1,3,9,21,41,71,113,175,283,499,945, 1833,3501,6475,11617,20479,36063,64287,116577, 214215,395583,728673,1333883,2427239,4403243, 7991759,14548745,26584661,48714993,89370903, 163903509,300276435,549583299,1005524031] |