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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 17 |
| 5 | 96 |
| 6 | 340 |
| 7 | 1639 |
| 8 | 6623 |
| 9 | 29843 |
| 10 | 126163 |
| 11 | 554310 |
| 12 | 2380524 |
| 13 | 10363965 |
| 14 | 44756085 |
| 15 | 194216303 |
| 16 | 840357677 |
| 17 | 3642433780 |
| 18 | 15771490916 |
| 19 | 68331367227 |
| 20 | 295943443667 |
| 21 | 1282011757819 |
| 22 | 5552887116543 |
| 23 | 24053558944522 |
| 24 | 104188496250108 |
[1,1,7,17,96,340,1639,6623,29843,126163,554310, 2380524,10363965,44756085,194216303,840357677, 3642433780,15771490916,68331367227,295943443667, 1282011757819,5552887116543,24053558944522, 104188496250108] |