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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 2 |
| 5 | 0 |
| 6 | 0 |
| 7 | 78 |
| 8 | 380 |
| 9 | 0 |
| 10 | 0 |
| 11 | 43106 |
| 12 | 230894 |
| 13 | 0 |
| 14 | 0 |
| 15 | 46470939 |
| 16 | 295990436 |
| 17 | 0 |
| 18 | 0 |
| 19 | 93486183164 |
| 20 | 677977634271 |
| 21 | 0 |
| 22 | 0 |
| 23 | 303816912226577 |
| 24 | 2444144451253085 |
| 25 | 0 |
| 26 | 0 |
| 27 | 1454786596073959830 |
| 28 | 12758706122701884626 |
| 29 | 0 |
| 30 | 0 |
[1,0,0,2,2,0,0,78,380,0,0,43106,230894,0,0, 46470939,295990436,0,0,93486183164,677977634271,0, 0,303816912226577,2444144451253085,0,0, 1454786596073959830,12758706122701884626,0,0] |