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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 125 |
| 3 | 1452 |
| 4 | 37584 |
| 5 | 631750 |
| 6 | 13344409 |
| 7 | 248864088 |
| 8 | 4964424625 |
| 9 | 95464562688 |
| 10 | 1872712598261 |
| 11 | 36340255066500 |
| 12 | 709361528836661 |
| 13 | 13802335712555182 |
| 14 | 269027285006250000 |
| 15 | 5238744073324512432 |
| 16 | 102066374099541816889 |
| 17 | 1987998048123941635250 |
| 18 | 38727167228395071878789 |
[1,2,125,1452,37584,631750,13344409,248864088, 4964424625,95464562688,1872712598261, 36340255066500,709361528836661,13802335712555182, 269027285006250000,5238744073324512432, 102066374099541816889,1987998048123941635250, 38727167228395071878789] |