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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 4 |
| 8 | 51 |
| 9 | 339 |
| 10 | 2010 |
| 11 | 10900 |
| 12 | 56700 |
| 13 | 286888 |
| 14 | 1426542 |
| 15 | 7014746 |
| 16 | 34229050 |
| 17 | 166197824 |
| 18 | 804243285 |
| 19 | 3883608940 |
| 20 | 18729354638 |
| 21 | 90266471623 |
| 22 | 434946282498 |
| 23 | 2096010533584 |
| 24 | 10104160993993 |
| 25 | 48733654211358 |
| 26 | 235195966291020 |
| 27 | 1135892493220025 |
| 28 | 5490005931157446 |
| 29 | 26555178320890184 |
| 30 | 128550000630553133 |
| 31 | 622790399873432344 |
| 32 | 3019641804537586657 |
[0,0,0,0,0,0,4,51,339,2010,10900,56700,286888, 1426542,7014746,34229050,166197824,804243285, 3883608940,18729354638,90266471623,434946282498, 2096010533584,10104160993993,48733654211358, 235195966291020,1135892493220025,5490005931157446, 26555178320890184,128550000630553133, 622790399873432344,3019641804537586657] |