| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 31 |
| 4 | 127 |
| 5 | 5113 |
| 6 | 303049 |
| 7 | 130677919 |
| 8 | 8561616127 |
| 9 | 343370835961 |
| 10 | 398015959727917 |
| 11 | 6536129506258687661 |
| 12 | 136824982467292060343 |
| 13 | 1727891550586579544797 |
| 14 | 518772379027828374941147 |
| 15 | 33164398702973727192477403 |
| 16 | 91254204345537698333055497929 |
[1,7,31,127,5113,303049,130677919,8561616127, 343370835961,398015959727917,6536129506258687661, 136824982467292060343,1727891550586579544797, 518772379027828374941147, 33164398702973727192477403, 91254204345537698333055497929] |