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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 59 |
| 4 | 279 |
| 5 | 1341 |
| 6 | 6529 |
| 7 | 31981 |
| 8 | 157601 |
| 9 | 778977 |
| 10 | 3861201 |
| 11 | 19173317 |
| 12 | 95347081 |
| 13 | 474671533 |
| 14 | 2365049859 |
| 15 | 11791810723 |
| 16 | 58822652725 |
| 17 | 293556016993 |
| 18 | 1465487556179 |
| 19 | 7317966766907 |
| 20 | 36550573297817 |
| 21 | 182589335006819 |
| 22 | 912264053437413 |
| 23 | 4558459999510109 |
| 24 | 22780286787593095 |
| 25 | 113850845864419591 |
[1,3,13,59,279,1341,6529,31981,157601,778977, 3861201,19173317,95347081,474671533,2365049859, 11791810723,58822652725,293556016993, 1465487556179,7317966766907,36550573297817, 182589335006819,912264053437413,4558459999510109, 22780286787593095,113850845864419591] |