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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 28 |
| 4 | 169 |
| 5 | 1054 |
| 6 | 6667 |
| 7 | 42627 |
| 8 | 275211 |
| 9 | 1791132 |
| 10 | 11731613 |
| 11 | 77242391 |
| 12 | 510826889 |
| 13 | 3391115560 |
| 14 | 22586150402 |
| 15 | 150866419771 |
| 16 | 1010290295683 |
| 17 | 6780795305121 |
| 18 | 45602955247738 |
| 19 | 307252705965207 |
| 20 | 2073546683753911 |
| 21 | 14014659243408481 |
| 22 | 94851805738129599 |
| 23 | 642767262413178788 |
| 24 | 4360774590348465669 |
[1,5,28,169,1054,6667,42627,275211,1791132, 11731613,77242391,510826889,3391115560, 22586150402,150866419771,1010290295683, 6780795305121,45602955247738,307252705965207, 2073546683753911,14014659243408481, 94851805738129599,642767262413178788, 4360774590348465669] |