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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 35 |
| 2 | 775 |
| 3 | 13895 |
| 4 | 220591 |
| 5 | 3239495 |
| 6 | 45114175 |
| 7 | 605081015 |
| 8 | 7896440431 |
| 9 | 100983137255 |
| 10 | 1271943884575 |
| 11 | 15837914099735 |
| 12 | 195494604120271 |
| 13 | 2397051804927815 |
| 14 | 29242027752046975 |
| 15 | 355340314794184055 |
| 16 | 4305125050033912111 |
| 17 | 52039828472216683175 |
| 18 | 627954645427055761375 |
[1,35,775,13895,220591,3239495,45114175,605081015, 7896440431,100983137255,1271943884575, 15837914099735,195494604120271,2397051804927815, 29242027752046975,355340314794184055, 4305125050033912111,52039828472216683175, 627954645427055761375] |