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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 12 |
| 3 | 56 |
| 4 | 168 |
| 5 | 418 |
| 6 | 837 |
| 7 | 1554 |
| 8 | 2640 |
| 9 | 4209 |
| 10 | 6375 |
| 11 | 9373 |
| 12 | 13176 |
| 13 | 18161 |
| 14 | 24402 |
| 15 | 32110 |
| 16 | 41472 |
| 17 | 52948 |
| 18 | 66339 |
| 19 | 82384 |
| 20 | 101100 |
| 21 | 122801 |
| 22 | 147741 |
| 23 | 176665 |
| 24 | 209088 |
| 25 | 246225 |
| 26 | 287976 |
| 27 | 334764 |
| 28 | 386904 |
| 29 | 445486 |
| 30 | 509625 |
| 31 | 581126 |
| 32 | 659712 |
| 33 | 745921 |
[0,1,12,56,168,418,837,1554,2640,4209,6375,9373, 13176,18161,24402,32110,41472,52948,66339,82384, 101100,122801,147741,176665,209088,246225,287976, 334764,386904,445486,509625,581126,659712,745921] |