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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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | 27 |
| 9 | 175 |
| 10 | 1533 |
| 11 | 14361 |
| 12 | 151575 |
| 13 | 1735869 |
| 14 | 21594863 |
| 15 | 289365383 |
| 16 | 4158887007 |
| 17 | 63822480809 |
| 18 | 1041820050629 |
| 19 | 18027531255745 |
| 20 | 329658402237171 |
| 21 | 6352776451924233 |
| 22 | 128686951765990343 |
| 23 | 2733851297673484765 |
| 24 | 60781108703102022027 |
| 25 | 1411481990523638719737 |
[0,0,0,0,1,1,5,27,175,1533,14361,151575,1735869, 21594863,289365383,4158887007,63822480809, 1041820050629,18027531255745,329658402237171, 6352776451924233,128686951765990343, 2733851297673484765,60781108703102022027, 1411481990523638719737] |