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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 41 |
| 3 | 337 |
| 4 | 2321 |
| 5 | 17537 |
| 6 | 134809 |
| 7 | 1023441 |
| 8 | 7759553 |
| 9 | 58921537 |
| 10 | 447447561 |
| 11 | 3397273553 |
| 12 | 25794057969 |
| 13 | 195847550081 |
| 14 | 1487017265657 |
| 15 | 11290490704977 |
| 16 | 85725445999521 |
| 17 | 650888811968321 |
| 18 | 4942012485147241 |
| 19 | 37523285458920273 |
[1,41,337,2321,17537,134809,1023441,7759553, 58921537,447447561,3397273553,25794057969, 195847550081,1487017265657,11290490704977, 85725445999521,650888811968321,4942012485147241, 37523285458920273] |