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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 36 |
| 6 | 112 |
| 7 | 350 |
| 8 | 1155 |
| 9 | 3925 |
| 10 | 13579 |
| 11 | 48220 |
| 12 | 173836 |
| 13 | 635911 |
| 14 | 2360420 |
| 15 | 8850743 |
| 16 | 33549545 |
| 17 | 128312974 |
| 18 | 494688957 |
| 19 | 1921574844 |
| 20 | 7512968389 |
| 21 | 29555315723 |
| 22 | 116910451943 |
| 23 | 464810687871 |
| 24 | 1856740321151 |
| 25 | 7448936153798 |
| 26 | 30004699108624 |
| 27 | 121312614191899 |
| 28 | 492189426529433 |
| 29 | 2003421447498019 |
[1,1,2,5,13,36,112,350,1155,3925,13579,48220, 173836,635911,2360420,8850743,33549545,128312974, 494688957,1921574844,7512968389,29555315723, 116910451943,464810687871,1856740321151, 7448936153798,30004699108624,121312614191899, 492189426529433,2003421447498019] |