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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 27 |
| 6 | 30 |
| 7 | 39 |
| 8 | 141 |
| 9 | 387 |
| 10 | 626 |
| 11 | 972 |
| 12 | 1544 |
| 13 | 2865 |
| 14 | 4371 |
| 15 | 5432 |
| 16 | 6356 |
| 17 | 7545 |
| 18 | 9207 |
| 19 | 25566 |
| 20 | 41313 |
| 21 | 41523 |
| 22 | 46760 |
| 23 | 125166 |
| 24 | 187281 |
[0,2,3,8,27,30,39,141,387,626,972,1544,2865,4371, 5432,6356,7545,9207,25566,41313,41523,46760, 125166,187281] |