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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 13 |
| 3 | 197 |
| 4 | 1105 |
| 5 | 9211 |
| 6 | 130277 |
| 7 | 82987349 |
| 8 | 331950131 |
| 9 | 16929464521 |
| 10 | 29241805241 |
| 11 | 3538258509761 |
| 12 | 6259995854281 |
| 13 | 1057939300471201 |
| 14 | 1057939300716589 |
| 15 | 51133732870640471 |
| 16 | 372975463296151087 |
| 17 | 107789908892879155343 |
| 18 | 51058377896658637853 |
| 19 | 681986753565766904623961 |
[0,3,13,197,1105,9211,130277,82987349,331950131, 16929464521,29241805241,3538258509761, 6259995854281,1057939300471201,1057939300716589, 51133732870640471,372975463296151087, 107789908892879155343,51058377896658637853, 681986753565766904623961] |