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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 20 |
| 3 | 294 |
| 4 | 3114 |
| 5 | 29120 |
| 6 | 256020 |
| 7 | 2173554 |
| 8 | 18060096 |
| 9 | 147976270 |
| 10 | 1201034302 |
| 11 | 9684108034 |
| 12 | 77719446198 |
| 13 | 621623562780 |
| 14 | 4959585660212 |
| 15 | 39496945637162 |
| 16 | 314112558505488 |
| 17 | 2495519478658458 |
| 18 | 19810840820555514 |
| 19 | 157179628657888198 |
[0,20,294,3114,29120,256020,2173554,18060096, 147976270,1201034302,9684108034,77719446198, 621623562780,4959585660212,39496945637162, 314112558505488,2495519478658458, 19810840820555514,157179628657888198] |