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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 13 |
| 6 | 82 |
| 7 | 579 |
| 8 | 4740 |
| 9 | 43387 |
| 10 | 439794 |
| 11 | 4890741 |
| 12 | 59216644 |
| 13 | 775596313 |
| 14 | 10927434466 |
| 15 | 164806435783 |
| 16 | 2649391469060 |
| 17 | 45226435601207 |
| 18 | 817056406224418 |
| 19 | 15574618910994665 |
| 20 | 312400218671253764 |
| 21 | 6577618644576902053 |
| 22 | 145051250421230224306 |
| 23 | 3343382818203784146955 |
[1,0,1,1,4,13,82,579,4740,43387,439794,4890741, 59216644,775596313,10927434466,164806435783, 2649391469060,45226435601207,817056406224418, 15574618910994665,312400218671253764, 6577618644576902053,145051250421230224306, 3343382818203784146955] |