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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 8 |
| 5 | 31 |
| 6 | 95 |
| 7 | 269 |
| 8 | 721 |
| 9 | 1866 |
| 10 | 4728 |
| 11 | 11804 |
| 12 | 29162 |
| 13 | 71502 |
| 14 | 174342 |
| 15 | 423341 |
| 16 | 1024786 |
| 17 | 2474934 |
| 18 | 5966625 |
| 19 | 14365256 |
| 20 | 34550674 |
| 21 | 83035396 |
| 22 | 199440433 |
| 23 | 478814076 |
| 24 | 1149133511 |
| 25 | 2757142136 |
| 26 | 6613933242 |
| 27 | 15863281135 |
| 28 | 38042981575 |
| 29 | 91225540813 |
| 30 | 218739876078 |
| 31 | 524464594304 |
| 32 | 1257437814143 |
| 33 | 3014693395137 |
[1,8,31,95,269,721,1866,4728,11804,29162,71502, 174342,423341,1024786,2474934,5966625,14365256, 34550674,83035396,199440433,478814076,1149133511, 2757142136,6613933242,15863281135,38042981575, 91225540813,218739876078,524464594304, 1257437814143,3014693395137] |