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| n | a(n) |
|---|---|
| 0 | 19 |
| 1 | 39 |
| 2 | 97 |
| 3 | 233 |
| 4 | 8951 |
| 5 | 18135 |
| 6 | 45221 |
| 7 | 108577 |
| 8 | 4171147 |
| 9 | 8450871 |
| 10 | 21072889 |
| 11 | 50596649 |
| 12 | 1943745551 |
| 13 | 3938087751 |
| 14 | 9819921053 |
| 15 | 23577929857 |
| 16 | 905781255619 |
| 17 | 1835140441095 |
| 18 | 4576062137809 |
| 19 | 10987264716713 |
| 20 | 422092121372903 |
| 21 | 855171507462519 |
| 22 | 2132435136297941 |
[19,39,97,233,8951,18135,45221,108577,4171147, 8450871,21072889,50596649,1943745551,3938087751, 9819921053,23577929857,905781255619,1835140441095, 4576062137809,10987264716713,422092121372903, 855171507462519,2132435136297941] |