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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 | 35 |
| 6 | 113 |
| 7 | 375 |
| 8 | 1310 |
| 9 | 4703 |
| 10 | 17330 |
| 11 | 65209 |
| 12 | 250114 |
| 13 | 973787 |
| 14 | 3843412 |
| 15 | 15348830 |
| 16 | 61943321 |
| 17 | 252282099 |
| 18 | 1036030465 |
| 19 | 4286325796 |
| 20 | 17852945250 |
| 21 | 74812425886 |
| 22 | 315247690475 |
| 23 | 1335177040541 |
| 24 | 5681387342453 |
| 25 | 24279598309480 |
| 26 | 104174406713499 |
| 27 | 448629070128615 |
| 28 | 1938691951621376 |
| 29 | 8404757306420331 |
[1,1,2,4,12,35,113,375,1310,4703,17330,65209, 250114,973787,3843412,15348830,61943321,252282099, 1036030465,4286325796,17852945250,74812425886, 315247690475,1335177040541,5681387342453, 24279598309480,104174406713499,448629070128615, 1938691951621376,8404757306420331] |