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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 29 |
| 5 | 95 |
| 6 | 371 |
| 7 | 1391 |
| 8 | 5579 |
| 9 | 22515 |
| 10 | 93172 |
| 11 | 389984 |
| 12 | 1660907 |
| 13 | 7129259 |
| 14 | 30986277 |
| 15 | 135626950 |
| 16 | 598601472 |
| 17 | 2659537838 |
| 18 | 11888774528 |
| 19 | 53438424419 |
| 20 | 241407630975 |
| 21 | 1095407211522 |
| 22 | 4991553340467 |
| 23 | 22831078844323 |
| 24 | 104797432694290 |
| 25 | 482588831392966 |
| 26 | 2228958459777283 |
| 27 | 10323814710499352 |
| 28 | 47940936376648040 |
[1,1,3,8,29,95,371,1391,5579,22515,93172,389984, 1660907,7129259,30986277,135626950,598601472, 2659537838,11888774528,53438424419,241407630975, 1095407211522,4991553340467,22831078844323, 104797432694290,482588831392966,2228958459777283, 10323814710499352,47940936376648040] |