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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 28 |
| 3 | 117 |
| 4 | 336 |
| 5 | 775 |
| 6 | 1548 |
| 7 | 2793 |
| 8 | 4672 |
| 9 | 7371 |
| 10 | 11100 |
| 11 | 16093 |
| 12 | 22608 |
| 13 | 30927 |
| 14 | 41356 |
| 15 | 54225 |
| 16 | 69888 |
| 17 | 88723 |
| 18 | 111132 |
| 19 | 137541 |
| 20 | 168400 |
| 21 | 204183 |
| 22 | 245388 |
| 23 | 292537 |
| 24 | 346176 |
| 25 | 406875 |
| 26 | 475228 |
| 27 | 551853 |
| 28 | 637392 |
| 29 | 732511 |
| 30 | 837900 |
| 31 | 954273 |
| 32 | 1082368 |
| 33 | 1222947 |
[0,3,28,117,336,775,1548,2793,4672,7371,11100, 16093,22608,30927,41356,54225,69888,88723,111132, 137541,168400,204183,245388,292537,346176,406875, 475228,551853,637392,732511,837900,954273,1082368, 1222947] |