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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 7 |
| 3 | 0 |
| 4 | 23 |
| 5 | 8 |
| 6 | 95 |
| 7 | 48 |
| 8 | 375 |
| 9 | 232 |
| 10 | 1183 |
| 11 | 1232 |
| 12 | 151 |
| 13 | 12680 |
| 14 | 4703 |
| 15 | 40112 |
| 16 | 43127 |
| 17 | 22248 |
| 18 | 437663 |
| 19 | 350928 |
| 20 | 700567 |
| 21 | 1404808 |
| 22 | 2809439 |
| 23 | 5605552 |
| 24 | 11227255 |
| 25 | 22449896 |
| 26 | 44914079 |
| 27 | 89795280 |
| 28 | 179372183 |
| 29 | 359202696 |
| 30 | 718605919 |
| 31 | 360904880 |
| 32 | 7169478775 |
| 33 | 5738573544 |
| 34 | 11506226591 |
[1,0,7,0,23,8,95,48,375,232,1183,1232,151,12680, 4703,40112,43127,22248,437663,350928,700567, 1404808,2809439,5605552,11227255,22449896, 44914079,89795280,179372183,359202696,718605919, 360904880,7169478775,5738573544,11506226591] |