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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 3 |
| 10 | 10 |
| 11 | 42 |
| 12 | 193 |
| 13 | 966 |
| 14 | 5215 |
| 15 | 30170 |
| 16 | 186234 |
| 17 | 1222065 |
| 18 | 8496274 |
| 19 | 62395234 |
| 20 | 482700052 |
| 21 | 3923995651 |
| 22 | 33444263516 |
| 23 | 298233514595 |
| 24 | 2777192597789 |
| 25 | 26959282453367 |
| 26 | 272370017131462 |
| 27 | 2859607460620573 |
| 28 | 31156130591833647 |
| 29 | 351808270089157421 |
[0,0,0,0,0,0,0,0,1,3,10,42,193,966,5215,30170, 186234,1222065,8496274,62395234,482700052, 3923995651,33444263516,298233514595,2777192597789, 26959282453367,272370017131462,2859607460620573, 31156130591833647,351808270089157421] |