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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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 21 |
| 7 | 55 |
| 8 | 146 |
| 9 | 413 |
| 10 | 1194 |
| 11 | 3553 |
| 12 | 10756 |
| 13 | 33134 |
| 14 | 103273 |
| 15 | 325484 |
| 16 | 1034734 |
| 17 | 3314870 |
| 18 | 10688513 |
| 19 | 34662777 |
| 20 | 112976023 |
| 21 | 369876832 |
| 22 | 1215811262 |
| 23 | 4010932603 |
| 24 | 13275356936 |
| 25 | 44070010202 |
| 26 | 146698487202 |
| 27 | 489550622528 |
| 28 | 1637472527602 |
| 29 | 5488829461525 |
| 30 | 18435194140301 |
[1,1,2,4,9,21,55,146,413,1194,3553,10756,33134, 103273,325484,1034734,3314870,10688513,34662777, 112976023,369876832,1215811262,4010932603, 13275356936,44070010202,146698487202,489550622528, 1637472527602,5488829461525,18435194140301] |