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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 | 5 |
| 3 | 28 |
| 4 | 265 |
| 5 | 3126 |
| 6 | 46750 |
| 7 | 823544 |
| 8 | 16778257 |
| 9 | 387420652 |
| 10 | 10000015646 |
| 11 | 285311670612 |
| 12 | 8916100731047 |
| 13 | 302875106592254 |
| 14 | 11112006831322846 |
| 15 | 437893890380906656 |
| 16 | 18446744073843774497 |
| 17 | 827240261886336764178 |
| 18 | 39346408075300025340205 |
[1,5,28,265,3126,46750,823544,16778257,387420652, 10000015646,285311670612,8916100731047, 302875106592254,11112006831322846, 437893890380906656,18446744073843774497, 827240261886336764178,39346408075300025340205] |