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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 205 |
| 3 | 5905 |
| 4 | 61681 |
| 5 | 375601 |
| 6 | 1634221 |
| 7 | 5649505 |
| 8 | 16519105 |
| 9 | 42521761 |
| 10 | 99009901 |
| 11 | 212601841 |
| 12 | 427016305 |
| 13 | 810932305 |
| 14 | 1468297741 |
| 15 | 2551550401 |
| 16 | 4278255361 |
| 17 | 6951703105 |
| 18 | 10986053005 |
| 19 | 16936647121 |
| 20 | 25536159601 |
| 21 | 37737287281 |
| 22 | 54762727405 |
| 23 | 78163228705 |
| 24 | 109884542401 |
[1,1,205,5905,61681,375601,1634221,5649505, 16519105,42521761,99009901,212601841,427016305, 810932305,1468297741,2551550401,4278255361, 6951703105,10986053005,16936647121,25536159601, 37737287281,54762727405,78163228705,109884542401] |