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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 | 6 |
| 4 | 24 |
| 5 | 64 |
| 6 | 225 |
| 7 | 764 |
| 8 | 2722 |
| 9 | 9580 |
| 10 | 35333 |
| 11 | 131684 |
| 12 | 492514 |
| 13 | 1858925 |
| 14 | 7193777 |
| 15 | 27685349 |
| 16 | 107329006 |
| 17 | 422367498 |
| 18 | 1663382081 |
| 19 | 6569551415 |
| 20 | 26183491349 |
| 21 | 104742616214 |
| 22 | 419747368413 |
| 23 | 1690117810113 |
| 24 | 6838109462432 |
| 25 | 27709003599961 |
| 26 | 112570921693236 |
| 27 | 459338700491764 |
| 28 | 1877453183701639 |
[1,1,3,6,24,64,225,764,2722,9580,35333,131684, 492514,1858925,7193777,27685349,107329006, 422367498,1663382081,6569551415,26183491349, 104742616214,419747368413,1690117810113, 6838109462432,27709003599961,112570921693236, 459338700491764,1877453183701639] |