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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 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 21 |
| 6 | 76 |
| 7 | 277 |
| 8 | 1011 |
| 9 | 3691 |
| 10 | 13476 |
| 11 | 49202 |
| 12 | 179641 |
| 13 | 655886 |
| 14 | 2394701 |
| 15 | 8743277 |
| 16 | 31922521 |
| 17 | 116552106 |
| 18 | 425542626 |
| 19 | 1553695877 |
| 20 | 5672688776 |
| 21 | 20711516601 |
| 22 | 75619681751 |
| 23 | 276094521627 |
| 24 | 1008046888156 |
| 25 | 3680473349246 |
| 26 | 13437751987201 |
[1,1,1,2,6,21,76,277,1011,3691,13476,49202,179641, 655886,2394701,8743277,31922521,116552106, 425542626,1553695877,5672688776,20711516601, 75619681751,276094521627,1008046888156, 3680473349246,13437751987201] |