The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 107 |
| 4 | 6020 |
| 5 | 701424 |
| 6 | 146665984 |
| 7 | 50005133576 |
| 8 | 25952660212352 |
| 9 | 19469692241358336 |
| 10 | 20277424971134267904 |
| 11 | 28384315863525074792448 |
| 12 | 52002222667299924427689984 |
| 13 | 121958564445078246232792363008 |
| 14 | 359324017883943122680656621023232 |
[0,1,5,107,6020,701424,146665984,50005133576, 25952660212352,19469692241358336, 20277424971134267904,28384315863525074792448, 52002222667299924427689984, 121958564445078246232792363008, 359324017883943122680656621023232] |