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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 1 |
| 3 | 7 |
| 4 | 17 |
| 5 | 55 |
| 6 | 49 |
| 7 | 151 |
| 8 | 481 |
| 9 | 295 |
| 10 | 2033 |
| 11 | 87 |
| 12 | 481 |
| 13 | 1127 |
| 14 | 7665 |
| 15 | 27159 |
| 16 | 89697 |
| 17 | 255975 |
| 18 | 45425 |
| 19 | 219031 |
| 20 | 720097 |
| 21 | 3616615 |
| 22 | 1695985 |
| 23 | 5022487 |
| 24 | 33517409 |
| 25 | 18085863 |
| 26 | 125409649 |
| 27 | 106745751 |
| 28 | 534180065 |
| 29 | 392377191 |
| 30 | 1710087409 |
| 31 | 2105077527 |
| 32 | 5489957729 |
| 33 | 12312281063 |
[1,3,1,7,17,55,49,151,481,295,2033,87,481,1127, 7665,27159,89697,255975,45425,219031,720097, 3616615,1695985,5022487,33517409,18085863, 125409649,106745751,534180065,392377191, 1710087409,2105077527,5489957729,12312281063] |