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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 21 |
| 3 | 173 |
| 4 | 1563 |
| 5 | 13863 |
| 6 | 118797 |
| 7 | 991175 |
| 8 | 8127097 |
| 9 | 65937979 |
| 10 | 531691453 |
| 11 | 4272259775 |
| 12 | 34260885697 |
| 13 | 274450101955 |
| 14 | 2197181305541 |
| 15 | 17584291437255 |
[3,21,173,1563,13863,118797,991175,8127097, 65937979,531691453,4272259775,34260885697, 274450101955,2197181305541,17584291437255] |