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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 | 2 |
| 3 | 6 |
| 4 | 21 |
| 5 | 74 |
| 6 | 248 |
| 7 | 787 |
| 8 | 2389 |
| 9 | 7013 |
| 10 | 20079 |
| 11 | 56417 |
| 12 | 156250 |
| 13 | 427914 |
| 14 | 1161571 |
| 15 | 3130892 |
| 16 | 8391305 |
| 17 | 22387648 |
| 18 | 59509600 |
| 19 | 157714833 |
| 20 | 416978205 |
| 21 | 1100298811 |
| 22 | 2898861767 |
| 23 | 7627745311 |
| 24 | 20050436226 |
| 25 | 52661977424 |
| 26 | 138224905323 |
[1,2,6,21,74,248,787,2389,7013,20079,56417,156250, 427914,1161571,3130892,8391305,22387648,59509600, 157714833,416978205,1100298811,2898861767, 7627745311,20050436226,52661977424,138224905323] |