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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 | 4 |
| 4 | 13 |
| 5 | 31 |
| 6 | 73 |
| 7 | 190 |
| 8 | 505 |
| 9 | 1316 |
| 10 | 3431 |
| 11 | 9065 |
| 12 | 24122 |
| 13 | 64325 |
| 14 | 172082 |
| 15 | 462344 |
| 16 | 1246685 |
| 17 | 3371135 |
| 18 | 9140289 |
| 19 | 24847422 |
| 20 | 67708743 |
| 21 | 184906614 |
| 22 | 505986933 |
| 23 | 1387240401 |
| 24 | 3810083424 |
| 25 | 10481797131 |
| 26 | 28880894706 |
| 27 | 79692785251 |
| 28 | 220203155689 |
| 29 | 609242057143 |
| 30 | 1687666776031 |
[1,1,1,4,13,31,73,190,505,1316,3431,9065,24122, 64325,172082,462344,1246685,3371135,9140289, 24847422,67708743,184906614,505986933,1387240401, 3810083424,10481797131,28880894706,79692785251, 220203155689,609242057143,1687666776031] |