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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 27 |
| 4 | 65 |
| 5 | 135 |
| 6 | 252 |
| 7 | 434 |
| 8 | 702 |
| 9 | 1080 |
| 10 | 1595 |
| 11 | 2277 |
| 12 | 3159 |
| 13 | 4277 |
| 14 | 5670 |
| 15 | 7380 |
| 16 | 9452 |
| 17 | 11934 |
| 18 | 14877 |
| 19 | 18335 |
| 20 | 22365 |
| 21 | 27027 |
| 22 | 32384 |
| 23 | 38502 |
| 24 | 45450 |
| 25 | 53300 |
| 26 | 62127 |
| 27 | 72009 |
| 28 | 83027 |
| 29 | 95265 |
| 30 | 108810 |
| 31 | 123752 |
| 32 | 140184 |
| 33 | 158202 |
| 34 | 177905 |
| 35 | 199395 |
| 36 | 222777 |
| 37 | 248159 |
[2,9,27,65,135,252,434,702,1080,1595,2277,3159, 4277,5670,7380,9452,11934,14877,18335,22365,27027, 32384,38502,45450,53300,62127,72009,83027,95265, 108810,123752,140184,158202,177905,199395,222777, 248159] |