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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 17 |
| 3 | 352 |
| 4 | 13505 |
| 5 | 830126 |
| 6 | 74717857 |
| 7 | 9263893892 |
| 8 | 1513712421377 |
| 9 | 315230799073690 |
| 10 | 81499084718806001 |
| 11 | 25612081645835777192 |
| 12 | 9615370149488574778177 |
| 13 | 4250194195208050117007942 |
| 14 | 2184834047906975645398282625 |
| 15 | 1292386053018890618812398220876 |
[1,2,17,352,13505,830126,74717857,9263893892, 1513712421377,315230799073690,81499084718806001, 25612081645835777192,9615370149488574778177, 4250194195208050117007942, 2184834047906975645398282625, 1292386053018890618812398220876] |