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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 12 |
| 3 | 145 |
| 4 | 1764 |
| 5 | 21602 |
| 6 | 266232 |
| 7 | 3301349 |
| 8 | 41178660 |
| 9 | 516512462 |
| 10 | 6513158376 |
| 11 | 82542517386 |
| 12 | 1051024082472 |
| 13 | 13442267711940 |
| 14 | 172638285341040 |
| 15 | 2225824753934445 |
| 16 | 28802104070304420 |
| 17 | 373966734921011990 |
[1,1,12,145,1764,21602,266232,3301349,41178660, 516512462,6513158376,82542517386,1051024082472, 13442267711940,172638285341040,2225824753934445, 28802104070304420,373966734921011990] |