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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 14 |
| 6 | 49 |
| 7 | 258 |
| 8 | 1385 |
| 9 | 1342 |
| 10 | -13739 |
| 11 | 1727362 |
| 12 | 20549165 |
| 13 | -892047378 |
| 14 | -13084315271 |
| 15 | 979519187138 |
| 16 | 16158974238545 |
| 17 | -1747908612654946 |
| 18 | -32246548780758179 |
| 19 | 4903305033480792642 |
| 20 | 100032668564662494485 |
| 21 | -20685044415403212103730 |
| 22 | -462550882810484735564351 |
[1,1,2,5,14,49,258,1385,1342,-13739,1727362, 20549165,-892047378,-13084315271,979519187138, 16158974238545,-1747908612654946, -32246548780758179,4903305033480792642, 100032668564662494485,-20685044415403212103730, -462550882810484735564351] |