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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2047 |
| 3 | 9096393 |
| 4 | 44100374341 |
| 5 | 203421120941736 |
| 6 | 877820839402932499 |
| 7 | 3578930527547615106601 |
| 8 | 13968353507597683646018640 |
| 9 | 52773530288643811045085269442 |
| 10 | 194648265795425910705859329140951 |
| 11 | 705285559217587334571033534680055625 |
[1,1,2047,9096393,44100374341,203421120941736, 877820839402932499,3578930527547615106601, 13968353507597683646018640, 52773530288643811045085269442, 194648265795425910705859329140951, 705285559217587334571033534680055625] |