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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 281 |
| 5 | 5276 |
| 6 | 132577 |
| 7 | 4209766 |
| 8 | 162569969 |
| 9 | 7430664952 |
| 10 | 393986044961 |
| 11 | 23861309117834 |
| 12 | 1630730511310441 |
| 13 | 124533452791281028 |
| 14 | 10541716135649976929 |
| 15 | 982527040998772635286 |
| 16 | 100258434765654907227233 |
[1,1,3,22,281,5276,132577,4209766,162569969, 7430664952,393986044961,23861309117834, 1630730511310441,124533452791281028, 10541716135649976929,982527040998772635286, 100258434765654907227233] |