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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 9 |
| 3 | 84 |
| 4 | 1353 |
| 5 | 24618 |
| 6 | 535122 |
| 7 | 13177587 |
| 8 | 370392657 |
| 9 | 11624145978 |
| 10 | 405212195604 |
| 11 | 15506995605357 |
| 12 | 647330629401534 |
| 13 | 29258665730749029 |
| 14 | 1424158024377474255 |
| 15 | 74261352697327011864 |
| 16 | 4130415517652786968257 |
[3,9,84,1353,24618,535122,13177587,370392657, 11624145978,405212195604,15506995605357, 647330629401534,29258665730749029, 1424158024377474255,74261352697327011864, 4130415517652786968257] |