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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 1513 |
| 4 | 60376809 |
| 5 | 613498040952501 |
| 6 | 2655748106132754540814283 |
| 7 | 7350748555338515554166266981278924209 |
| 8 | 18155845241010181420704703186769135339279915667193169 |
| 9 | 53121946985233865823079732996510797894348260342024814486694637630897821 |
[1,1,5,1513,60376809,613498040952501, 2655748106132754540814283, 7350748555338515554166266981278924209, 18155845241010181420704703186769135339279915667193\ 169, 53121946985233865823079732996510797894348260342024\ 814486694637630897821] |