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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 57 |
| 3 | 527 |
| 4 | 5441 |
| 5 | 61959 |
| 6 | 770713 |
| 7 | 10391023 |
| 8 | 150869313 |
| 9 | 2346167879 |
| 10 | 38896509881 |
| 11 | 684702346767 |
| 12 | 12752503850497 |
| 13 | 250514001320647 |
| 14 | 5176062576469401 |
| 15 | 112204510124346479 |
| 16 | 2546140161382663553 |
| 17 | 60356495873790805383 |
| 18 | 1491840283714484609593 |
| 19 | 38382424018590349736719 |
[1,7,57,527,5441,61959,770713,10391023,150869313, 2346167879,38896509881,684702346767, 12752503850497,250514001320647,5176062576469401, 112204510124346479,2546140161382663553, 60356495873790805383,1491840283714484609593, 38382424018590349736719] |