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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 0 |
| 4 | 29 |
| 5 | 14 |
| 6 | 95 |
| 7 | 240 |
| 8 | 13 |
| 9 | 990 |
| 10 | 495 |
| 11 | 2144 |
| 12 | 5853 |
| 13 | 16334 |
| 14 | 6687 |
| 15 | 48560 |
| 16 | 101837 |
| 17 | 83870 |
| 18 | 500015 |
| 19 | 121440 |
| 20 | 1637597 |
| 21 | 1411534 |
| 22 | 8278559 |
| 23 | 1369520 |
| 24 | 28856269 |
| 25 | 32932254 |
| 26 | 106395951 |
| 27 | 16454240 |
| 28 | 480945373 |
| 29 | 167758286 |
| 30 | 1376686623 |
| 31 | 3854771632 |
| 32 | 1337348045 |
| 33 | 11038392734 |
[1,2,7,0,29,14,95,240,13,990,495,2144,5853,16334, 6687,48560,101837,83870,500015,121440,1637597, 1411534,8278559,1369520,28856269,32932254, 106395951,16454240,480945373,167758286,1376686623, 3854771632,1337348045,11038392734] |