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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 3 |
| 9 | 5 |
| 10 | 11 |
| 11 | 41 |
| 12 | 371 |
| 13 | 7507 |
| 14 | 429563 |
| 15 | 419408854 |
| 16 | 9811194604889 |
| 17 | 45615501062085527113 |
| 18 | 323645006689468299915979814409 |
| 19 | 217332607887523478570092794860281557159140687 |
| 20 | 8092345737591989154121803868154457767563221634145658745306515944569 |
[1,1,1,1,1,1,1,2,3,5,11,41,371,7507,429563, 419408854,9811194604889,45615501062085527113, 323645006689468299915979814409, 217332607887523478570092794860281557159140687, 80923457375919891541218038681544577675632216341456\ 58745306515944569] |