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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 | 3 |
| 4 | 10 |
| 5 | 20 |
| 6 | 68 |
| 7 | 147 |
| 8 | 558 |
| 9 | 1308 |
| 10 | 4840 |
| 11 | 11638 |
| 12 | 45142 |
| 13 | 112918 |
| 14 | 431806 |
| 15 | 1095775 |
| 16 | 4299562 |
| 17 | 11168048 |
| 18 | 43431360 |
| 19 | 113876158 |
| 20 | 449752342 |
| 21 | 1197311782 |
| 22 | 4700292130 |
| 23 | 12596627212 |
| 24 | 49945553674 |
| 25 | 135283990390 |
| 26 | 534123243068 |
| 27 | 1454033588472 |
| 28 | 5779639647718 |
| 29 | 15857393541418 |
| 30 | 62837646837160 |
| 31 | 173088744641491 |
[1,1,2,3,10,20,68,147,558,1308,4840,11638,45142, 112918,431806,1095775,4299562,11168048,43431360, 113876158,449752342,1197311782,4700292130, 12596627212,49945553674,135283990390,534123243068, 1454033588472,5779639647718,15857393541418, 62837646837160,173088744641491] |