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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 59 |
| 4 | 1128 |
| 5 | 29954 |
| 6 | 1019282 |
| 7 | 42318296 |
| 8 | 2074276320 |
| 9 | 117237652008 |
| 10 | 7506386360232 |
| 11 | 536983774338120 |
| 12 | 42447806791009056 |
| 13 | 3674351246886880416 |
| 14 | 345667310491536157056 |
| 15 | 35116581800947400780928 |
| 16 | 3831441153568328284066560 |
| 17 | 446832269484565155280539264 |
[0,1,5,59,1128,29954,1019282,42318296,2074276320, 117237652008,7506386360232,536983774338120, 42447806791009056,3674351246886880416, 345667310491536157056,35116581800947400780928, 3831441153568328284066560, 446832269484565155280539264] |