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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 | 11 |
| 5 | 32 |
| 6 | 98 |
| 7 | 309 |
| 8 | 998 |
| 9 | 3285 |
| 10 | 10981 |
| 11 | 37178 |
| 12 | 127227 |
| 13 | 439369 |
| 14 | 1529280 |
| 15 | 5359314 |
| 16 | 18894435 |
| 17 | 66967086 |
| 18 | 238473876 |
| 19 | 852825314 |
| 20 | 3061529014 |
| 21 | 11028596473 |
| 22 | 39853923390 |
| 23 | 144435373636 |
| 24 | 524837483375 |
| 25 | 1911763716717 |
| 26 | 6979451843306 |
[1,1,1,4,11,32,98,309,998,3285,10981,37178,127227, 439369,1529280,5359314,18894435,66967086, 238473876,852825314,3061529014,11028596473, 39853923390,144435373636,524837483375, 1911763716717,6979451843306] |