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| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 10 |
| 7 | 19 |
| 8 | 41 |
| 9 | 86 |
| 10 | 197 |
| 11 | 449 |
| 12 | 1087 |
| 13 | 2650 |
| 14 | 6722 |
| 15 | 17227 |
| 16 | 45267 |
| 17 | 120069 |
| 18 | 323442 |
| 19 | 877777 |
| 20 | 2405399 |
| 21 | 6628760 |
| 22 | 18384040 |
| 23 | 51204735 |
| 24 | 143252991 |
| 25 | 402115301 |
| 26 | 1132464571 |
| 27 | 3197928097 |
| 28 | 9053803101 |
| 29 | 25689876776 |
| 30 | 73047889402 |
| 31 | 208100836969 |
| 32 | 593897902349 |
| 33 | 1697686011406 |
[2,3,5,10,19,41,86,197,449,1087,2650,6722,17227, 45267,120069,323442,877777,2405399,6628760, 18384040,51204735,143252991,402115301,1132464571, 3197928097,9053803101,25689876776,73047889402, 208100836969,593897902349,1697686011406] |