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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 36 |
| 2 | 1260 |
| 3 | 44100 |
| 4 | 1543500 |
| 5 | 54022500 |
| 6 | 1890787500 |
| 7 | 66177562500 |
| 8 | 2316214686870 |
| 9 | 81067514018400 |
| 10 | 2837362989872880 |
| 11 | 99307704618561600 |
| 12 | 3475769660705034000 |
| 13 | 121651938091614420000 |
| 14 | 4257817832049342750000 |
| 15 | 149023624081226328000000 |
[1,36,1260,44100,1543500,54022500,1890787500, 66177562500,2316214686870,81067514018400, 2837362989872880,99307704618561600, 3475769660705034000,121651938091614420000, 4257817832049342750000,149023624081226328000000] |