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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 19 |
| 4 | 97 |
| 5 | 601 |
| 6 | 35281 |
| 7 | 5748019201 |
| 8 | 2311256907767808001 |
| 9 | 594596384994354462720001 |
| 10 | 5382999938946608755288342267304597177897268019200000000001 |
| 11 | 136332557214406957166109544809874331662074014454506289616400595025920000000000001 |
[2,5,19,97,601,35281,5748019201, 2311256907767808001,594596384994354462720001, 53829999389466087552883422673045971778972680192000\ 00000001, 13633255721440695716610954480987433166207401445450\ 6289616400595025920000000000001] |