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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 13 |
| 5 | 867 |
| 6 | 12001543 |
| 7 | 4909644519038939 |
| 8 | 2976533007674072187623474816337374 |
| 9 | 5305128832761583696023807632374530398637482018663107882637653612424699 |
[1,1,1,2,13,867,12001543,4909644519038939, 2976533007674072187623474816337374, 53051288327615836960238076323745303986374820186631\ 07882637653612424699] |