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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 41 |
| 4 | 871 |
| 5 | 36137 |
| 6 | 2885457 |
| 7 | 443469511 |
| 8 | 131707909982 |
| 9 | 75945551138638 |
| 10 | 85425571722359386 |
| 11 | 188277619627892581987 |
| 12 | 816318863956958720950775 |
| 13 | 6986374103851011507327849798 |
| 14 | 118360360643974268213872443877649 |
| 15 | 3978536338453184605328853807076468581 |
[1,1,4,41,871,36137,2885457,443469511, 131707909982,75945551138638,85425571722359386, 188277619627892581987,816318863956958720950775, 6986374103851011507327849798, 118360360643974268213872443877649, 3978536338453184605328853807076468581] |