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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 31 |
| 4 | 117 |
| 5 | 471 |
| 6 | 2053 |
| 7 | 9339 |
| 8 | 45321 |
| 9 | 227467 |
| 10 | 1203681 |
| 11 | 6556023 |
| 12 | 37316029 |
| 13 | 217944351 |
| 14 | 1321360797 |
| 15 | 8201728531 |
| 16 | 52577120913 |
| 17 | 344433580179 |
| 18 | 2321103364921 |
| 19 | 15960060854607 |
| 20 | 112534486969221 |
| 21 | 808555930139623 |
| 22 | 5942117054417589 |
| 23 | 44446333314841131 |
[1,3,9,31,117,471,2053,9339,45321,227467,1203681, 6556023,37316029,217944351,1321360797,8201728531, 52577120913,344433580179,2321103364921, 15960060854607,112534486969221,808555930139623, 5942117054417589,44446333314841131] |