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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 247 |
| 4 | 87453 |
| 5 | 30392377 |
| 6 | 83081803051 |
| 7 | 447717938403725 |
| 8 | 76261525038193025805 |
| 9 | 6426287262393575837153381 |
| 10 | 4292008745048222678362226977889 |
| 11 | 5685934933249315447199351722237681091 |
[1,2,11,247,87453,30392377,83081803051, 447717938403725,76261525038193025805, 6426287262393575837153381, 4292008745048222678362226977889, 5685934933249315447199351722237681091] |