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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 27 |
| 3 | 151 |
| 4 | 857 |
| 5 | 4893 |
| 6 | 28003 |
| 7 | 160415 |
| 8 | 919281 |
| 9 | 5268853 |
| 10 | 30200171 |
| 11 | 173106279 |
| 12 | 992248009 |
| 13 | 5687602445 |
| 14 | 32601595443 |
| 15 | 186873931759 |
| 16 | 1071170713313 |
| 17 | 6140004593637 |
| 18 | 35194817476027 |
| 19 | 201738480090935 |
| 20 | 1156375213539129 |
| 21 | 6628401467130877 |
| 22 | 37994333961038339 |
| 23 | 217785452615605311 |
[1,5,27,151,857,4893,28003,160415,919281,5268853, 30200171,173106279,992248009,5687602445, 32601595443,186873931759,1071170713313, 6140004593637,35194817476027,201738480090935, 1156375213539129,6628401467130877, 37994333961038339,217785452615605311] |