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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 57 |
| 3 | 299 |
| 4 | 2255 |
| 5 | 17093 |
| 6 | 120633 |
| 7 | 879613 |
| 8 | 6412539 |
| 9 | 46525107 |
| 10 | 338253489 |
| 11 | 2459404433 |
| 12 | 17875504331 |
| 13 | 129938237918 |
| 14 | 944542662421 |
| 15 | 6865907710814 |
| 16 | 49908732400817 |
| 17 | 362790040553962 |
| 18 | 2637143711833537 |
| 19 | 19169570408819186 |
| 20 | 139344858180341619 |
[5,57,299,2255,17093,120633,879613,6412539, 46525107,338253489,2459404433,17875504331, 129938237918,944542662421,6865907710814, 49908732400817,362790040553962,2637143711833537, 19169570408819186,139344858180341619] |