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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 37 |
| 4 | 252 |
| 5 | 202502 |
| 6 | 2595 |
| 7 | 3573588375003 |
| 8 | 2219710571718754 |
| 9 | 2188822879687504 |
| 10 | 29549108875781255 |
| 11 | 250366409274156575302546875005 |
| 12 | 5789291173553173247164869257812506 |
[1,5,37,252,202502,2595,3573588375003, 2219710571718754,2188822879687504, 29549108875781255,250366409274156575302546875005, 5789291173553173247164869257812506] |