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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 | 2 |
| 3 | 5 |
| 4 | 15 |
| 5 | 51 |
| 6 | 187 |
| 7 | 715 |
| 8 | 2795 |
| 9 | 11051 |
| 10 | 43947 |
| 11 | 175275 |
| 12 | 700075 |
| 13 | 2798251 |
| 14 | 11188907 |
| 15 | 44747435 |
| 16 | 178973355 |
| 17 | 715860651 |
| 18 | 2863377067 |
| 19 | 11453377195 |
| 20 | 45813246635 |
| 21 | 183252462251 |
| 22 | 733008800427 |
| 23 | 2932033104555 |
| 24 | 11728128223915 |
| 25 | 46912504507051 |
| 26 | 187650001250987 |
[1,1,2,5,15,51,187,715,2795,11051,43947,175275, 700075,2798251,11188907,44747435,178973355, 715860651,2863377067,11453377195,45813246635, 183252462251,733008800427,2932033104555, 11728128223915,46912504507051,187650001250987] |