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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 10 |
| 3 | 181 |
| 4 | 4078 |
| 5 | 102826 |
| 6 | 2777212 |
| 7 | 78571837 |
| 8 | 2298558934 |
| 9 | 68964092542 |
| 10 | 2110472708140 |
| 11 | 65620725560578 |
| 12 | 2067160250751436 |
| 13 | 65833929303952564 |
| 14 | 2116166898185821792 |
| 15 | 68565914052628406221 |
| 16 | 2237022199842087256678 |
[1,1,10,181,4078,102826,2777212,78571837, 2298558934,68964092542,2110472708140, 65620725560578,2067160250751436,65833929303952564, 2116166898185821792,68565914052628406221, 2237022199842087256678] |