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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 19 |
| 5 | 141 |
| 6 | 301 |
| 7 | 743 |
| 8 | 1044 |
| 9 | 2831 |
| 10 | 176566 |
| 11 | 355963 |
| 12 | 532529 |
| 13 | 1421021 |
| 14 | 3374571 |
| 15 | 25043018 |
| 16 | 53460607 |
| 17 | 131964232 |
| 18 | 185424839 |
| 19 | 502813910 |
| 20 | 31359887259 |
| 21 | 63222588428 |
| 22 | 94582475687 |
| 23 | 252387539802 |
| 24 | 599357555291 |
| 25 | 4447890426839 |
| 26 | 9495138408969 |
| 27 | 23438167244777 |
[1,2,3,8,19,141,301,743,1044,2831,176566,355963, 532529,1421021,3374571,25043018,53460607, 131964232,185424839,502813910,31359887259, 63222588428,94582475687,252387539802,599357555291, 4447890426839,9495138408969,23438167244777] |