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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 136 |
| 4 | 4933 |
| 5 | 275536 |
| 6 | 21309139 |
| 7 | 2137447936 |
| 8 | 266227499017 |
| 9 | 39924910381312 |
| 10 | 7045914488563711 |
| 11 | 1437809941831499776 |
| 12 | 334581893955246072205 |
| 13 | 87792555944973238718464 |
| 14 | 25735892905876612366925515 |
| 15 | 8363132129019712402301648896 |
| 16 | 2992768723058093966270081891089 |
[1,1,7,136,4933,275536,21309139,2137447936, 266227499017,39924910381312,7045914488563711, 1437809941831499776,334581893955246072205, 87792555944973238718464, 25735892905876612366925515, 8363132129019712402301648896, 2992768723058093966270081891089] |