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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 8 |
| 11 | 43 |
| 12 | 188 |
| 13 | 720 |
| 14 | 2522 |
| 15 | 8288 |
| 16 | 25973 |
| 17 | 78506 |
| 18 | 230716 |
| 19 | 663100 |
| 20 | 1871936 |
| 21 | 5207632 |
| 22 | 14312497 |
| 23 | 38937270 |
| 24 | 105015752 |
| 25 | 281132871 |
| 26 | 747756946 |
| 27 | 1977633148 |
| 28 | 5204143935 |
| 29 | 13633435312 |
| 30 | 35572076796 |
| 31 | 92475463113 |
| 32 | 239606189255 |
[0,0,0,0,0,0,0,0,0,1,8,43,188,720,2522,8288,25973, 78506,230716,663100,1871936,5207632,14312497, 38937270,105015752,281132871,747756946,1977633148, 5204143935,13633435312,35572076796,92475463113, 239606189255] |