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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 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 22 |
| 6 | 82 |
| 7 | 308 |
| 8 | 1225 |
| 9 | 4954 |
| 10 | 20558 |
| 11 | 86572 |
| 12 | 369942 |
| 13 | 1598172 |
| 14 | 6972100 |
| 15 | 30663656 |
| 16 | 135826627 |
| 17 | 605386062 |
| 18 | 2713066882 |
| 19 | 12217967284 |
| 20 | 55262144418 |
| 21 | 250932354484 |
| 22 | 1143468874748 |
| 23 | 5227460728344 |
| 24 | 23968152050930 |
| 25 | 110191808568852 |
| 26 | 507857114699628 |
[1,1,2,7,22,82,308,1225,4954,20558,86572,369942, 1598172,6972100,30663656,135826627,605386062, 2713066882,12217967284,55262144418,250932354484, 1143468874748,5227460728344,23968152050930, 110191808568852,507857114699628] |