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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 | 5 |
| 2 | 13 |
| 3 | 45 |
| 4 | 173 |
| 5 | 8365 |
| 6 | 73901 |
| 7 | 204973 |
| 8 | 467117 |
| 9 | 991405 |
| 10 | 5185709 |
| 11 | 13574317 |
| 12 | 80683181 |
| 13 | 214900909 |
| 14 | 1288642733 |
| 15 | 3436126381 |
| 16 | 7731093677 |
| 17 | 16321028269 |
| 18 | 33500897453 |
| 19 | 67860635821 |
| 20 | 136580112557 |
| 21 | 686335926445 |
| 22 | 1785847554221 |
[1,5,13,45,173,8365,73901,204973,467117,991405, 5185709,13574317,80683181,214900909,1288642733, 3436126381,7731093677,16321028269,33500897453, 67860635821,136580112557,686335926445, 1785847554221] |