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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 229 |
| 3 | 4654 |
| 4 | 102766 |
| 5 | 2395588 |
| 6 | 58018051 |
| 7 | 1445559583 |
| 8 | 36814892431 |
| 9 | 954069925159 |
| 10 | 25078529906554 |
| 11 | 667026049270594 |
| 12 | 17918499388172959 |
| 13 | 485458570769113201 |
| 14 | 13249366192918472773 |
| 15 | 363936845430399270718 |
| 16 | 10053396678028761441193 |
| 17 | 279112559195478744158917 |
[1,13,229,4654,102766,2395588,58018051,1445559583, 36814892431,954069925159,25078529906554, 667026049270594,17918499388172959, 485458570769113201,13249366192918472773, 363936845430399270718,10053396678028761441193, 279112559195478744158917] |