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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 33 |
| 4 | 292 |
| 5 | 3195 |
| 6 | 47154 |
| 7 | 824467 |
| 8 | 16783176 |
| 9 | 387434574 |
| 10 | 10000082730 |
| 11 | 285311855367 |
| 12 | 8916101760828 |
| 13 | 302875109296409 |
| 14 | 11112006847596746 |
| 15 | 437893890421433595 |
| 16 | 18446744074133995664 |
| 17 | 827240261886937844567 |
| 18 | 39346408075305857765940 |
[1,6,33,292,3195,47154,824467,16783176,387434574, 10000082730,285311855367,8916101760828, 302875109296409,11112006847596746, 437893890421433595,18446744074133995664, 827240261886937844567,39346408075305857765940] |