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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 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 24 |
| 6 | 56 |
| 7 | 132 |
| 8 | 344 |
| 9 | 880 |
| 10 | 2216 |
| 11 | 5568 |
| 12 | 14912 |
| 13 | 39248 |
| 14 | 101952 |
| 15 | 265216 |
| 16 | 718240 |
| 17 | 1925376 |
| 18 | 5115008 |
| 19 | 13574976 |
| 20 | 37150464 |
| 21 | 100744448 |
| 22 | 271103616 |
| 23 | 729513984 |
| 24 | 2008900096 |
| 25 | 5495163136 |
| 26 | 14942424576 |
| 27 | 40595259392 |
| 28 | 112428786176 |
| 29 | 309465434112 |
| 30 | 847395311616 |
[1,2,4,10,24,56,132,344,880,2216,5568,14912,39248, 101952,265216,718240,1925376,5115008,13574976, 37150464,100744448,271103616,729513984,2008900096, 5495163136,14942424576,40595259392,112428786176, 309465434112,847395311616] |