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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 13 |
| 3 | 371 |
| 4 | 17389 |
| 5 | 1369057 |
| 6 | 168362459 |
| 7 | 28396593031 |
| 8 | 6237698137129 |
| 9 | 1823043651343241 |
| 10 | 654314519766396223 |
| 11 | 288203550242534470051 |
| 12 | 151792464548141462268029 |
| 13 | 95104739612472479469277141 |
| 14 | 68849533918239714802762113739 |
| 15 | 58193958459903387205593351715847 |
[1,2,13,371,17389,1369057,168362459,28396593031, 6237698137129,1823043651343241,654314519766396223, 288203550242534470051,151792464548141462268029, 95104739612472479469277141, 68849533918239714802762113739, 58193958459903387205593351715847] |