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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 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 32 |
| 5 | 118 |
| 6 | 455 |
| 7 | 1803 |
| 8 | 7304 |
| 9 | 30104 |
| 10 | 125834 |
| 11 | 532154 |
| 12 | 2272728 |
| 13 | 9788310 |
| 14 | 42464315 |
| 15 | 185394551 |
| 16 | 813950824 |
| 17 | 3591328136 |
| 18 | 15916173734 |
| 19 | 70819784774 |
| 20 | 316254424144 |
| 21 | 1416906860412 |
| 22 | 6367136425862 |
| 23 | 28690381745294 |
[1,1,3,9,32,118,455,1803,7304,30104,125834,532154, 2272728,9788310,42464315,185394551,813950824, 3591328136,15916173734,70819784774,316254424144, 1416906860412,6367136425862,28690381745294] |