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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 101 |
| 3 | 1020101 |
| 4 | 1061522231810040101 |
| 5 | 1196154511175776540960913502483611007728163340227060101 |
[1,5,101,1020101,1061522231810040101, 11961545111757765409609135024836110077281633402270\ 60101] |