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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 115 |
| 4 | 2265 |
| 5 | 59701 |
| 6 | 1981513 |
| 7 | 79441167 |
| 8 | 3736418801 |
| 9 | 201790517833 |
| 10 | 12309193580841 |
| 11 | 837132560820139 |
| 12 | 62809405894333321 |
| 13 | 5154060532188515325 |
| 14 | 459202970647825870313 |
| 15 | 44146740571635016905991 |
| 16 | 4555272678073789024849377 |
| 17 | 502153774773932684443210513 |
[1,1,9,115,2265,59701,1981513,79441167,3736418801, 201790517833,12309193580841,837132560820139, 62809405894333321,5154060532188515325, 459202970647825870313,44146740571635016905991, 4555272678073789024849377, 502153774773932684443210513] |