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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 12 |
| 3 | 51 |
| 4 | 227 |
| 5 | 1032 |
| 6 | 4771 |
| 7 | 22303 |
| 8 | 105172 |
| 9 | 499224 |
| 10 | 2382287 |
| 11 | 11417067 |
| 12 | 54911577 |
| 13 | 264895775 |
| 14 | 1281143686 |
| 15 | 6209829047 |
| 16 | 30157663079 |
| 17 | 146707096810 |
| 18 | 714753840271 |
| 19 | 3486934763359 |
| 20 | 17031540144399 |
| 21 | 83279152024797 |
| 22 | 407612515967400 |
| 23 | 1996870740970424 |
| 24 | 9790634214005765 |
| 25 | 48039818387010011 |
| 26 | 235882744914207304 |
[1,3,12,51,227,1032,4771,22303,105172,499224, 2382287,11417067,54911577,264895775,1281143686, 6209829047,30157663079,146707096810,714753840271, 3486934763359,17031540144399,83279152024797, 407612515967400,1996870740970424,9790634214005765, 48039818387010011,235882744914207304] |