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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 28 |
| 4 | 168 |
| 5 | 4798 |
| 6 | 157007 |
| 7 | 8436662 |
| 8 | 1148371444 |
| 9 | 277147933683 |
| 10 | 118428732870726 |
[1,4,28,168,4798,157007,8436662,1148371444, 277147933683,118428732870726] |