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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 | 4 |
| 4 | 12 |
| 5 | 28 |
| 6 | 86 |
| 7 | 238 |
| 8 | 774 |
| 9 | 2305 |
| 10 | 7777 |
| 11 | 24868 |
| 12 | 85478 |
| 13 | 286633 |
| 14 | 1004647 |
| 15 | 3487183 |
| 16 | 12416017 |
| 17 | 44263145 |
| 18 | 159973682 |
| 19 | 581589707 |
| 20 | 2131952784 |
| 21 | 7868316102 |
| 22 | 29213757901 |
| 23 | 109116932442 |
| 24 | 409785142527 |
| 25 | 1545943082568 |
| 26 | 5863919090903 |
| 27 | 22316371285123 |
| 28 | 85376347850224 |
| 29 | 327482705722678 |
| 30 | 1262091415093097 |
| 31 | 4875741167821283 |
[1,1,2,4,12,28,86,238,774,2305,7777,24868,85478, 286633,1004647,3487183,12416017,44263145, 159973682,581589707,2131952784,7868316102, 29213757901,109116932442,409785142527, 1545943082568,5863919090903,22316371285123, 85376347850224,327482705722678,1262091415093097, 4875741167821283] |