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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 8 |
| 5 | 1 |
| 6 | 40 |
| 7 | 2 |
| 8 | 160 |
| 9 | 17 |
| 10 | 796 |
| 11 | 104 |
| 12 | 3722 |
| 13 | 480 |
| 14 | 17398 |
| 15 | 2687 |
| 16 | 82803 |
| 17 | 13994 |
| 18 | 391543 |
| 19 | 71546 |
| 20 | 1856274 |
| 21 | 370012 |
| 22 | 8811898 |
| 23 | 1887331 |
| 24 | 41818642 |
| 25 | 9587496 |
| 26 | 198572128 |
| 27 | 48548770 |
| 28 | 943058746 |
| 29 | 244715696 |
| 30 | 4479189932 |
| 31 | 1229654538 |
| 32 | 21277462741 |
| 33 | 6160387914 |
| 34 | 101081540520 |
[1,0,1,0,8,1,40,2,160,17,796,104,3722,480,17398, 2687,82803,13994,391543,71546,1856274,370012, 8811898,1887331,41818642,9587496,198572128, 48548770,943058746,244715696,4479189932, 1229654538,21277462741,6160387914,101081540520] |